Home / 689,904,313.70-1,034,856,470.55-621,879,865.70

Finding the Fourth Proportional to 689,904,313.70, 1,034,856,470.55 and 621,879,865.70

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Solution

The fourth proportional to 689,904,313.70, 1,034,856,470.55 and 621,879,865.70 is: 932,819,798.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,904,313.70 : 1,034,856,470.55 = 621,879,865.70 : x
  2. Step 2: Convert to fraction form
    689,904,313.70/1,034,856,470.55 = 621,879,865.70/x
  3. Step 3: Cross multiply
    689,904,313.70x = 1,034,856,470.55 × 621,879,865.70
  4. Step 4: Simplify right side
    689,904,313.70x = 643,556,402,924,409,984
  5. Step 5: Solve for x
    x = 643,556,402,924,409,984/689,904,313.70
  6. Step 6: Final answer
    x = 932,819,798.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.