Home / 689,104.69-951,221.71-402,716.23

Finding the Fourth Proportional to 689,104.69, 951,221.71 and 402,716.23

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Solution

The fourth proportional to 689,104.69, 951,221.71 and 402,716.23 is: 555,898.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,104.69 : 951,221.71 = 402,716.23 : x
  2. Step 2: Convert to fraction form
    689,104.69/951,221.71 = 402,716.23/x
  3. Step 3: Cross multiply
    689,104.69x = 951,221.71 × 402,716.23
  4. Step 4: Simplify right side
    689,104.69x = 383,072,420,945.35
  5. Step 5: Solve for x
    x = 383,072,420,945.35/689,104.69
  6. Step 6: Final answer
    x = 555,898.73

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.