Home / 809,301.70-1,213,952.55-389,397.70

Finding the Fourth Proportional to 809,301.70, 1,213,952.55 and 389,397.70

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Solution

The fourth proportional to 809,301.70, 1,213,952.55 and 389,397.70 is: 584,096.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,301.70 : 1,213,952.55 = 389,397.70 : x
  2. Step 2: Convert to fraction form
    809,301.70/1,213,952.55 = 389,397.70/x
  3. Step 3: Cross multiply
    809,301.70x = 1,213,952.55 × 389,397.70
  4. Step 4: Simplify right side
    809,301.70x = 472,710,330,879.14
  5. Step 5: Solve for x
    x = 472,710,330,879.14/809,301.70
  6. Step 6: Final answer
    x = 584,096.55

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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.