Home / 661,631.40-992,447.10-380,917.80

Finding the Fourth Proportional to 661,631.40, 992,447.10 and 380,917.80

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Solution

The fourth proportional to 661,631.40, 992,447.10 and 380,917.80 is: 571,376.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,631.40 : 992,447.10 = 380,917.80 : x
  2. Step 2: Convert to fraction form
    661,631.40/992,447.10 = 380,917.80/x
  3. Step 3: Cross multiply
    661,631.40x = 992,447.10 × 380,917.80
  4. Step 4: Simplify right side
    661,631.40x = 378,040,765,948.38
  5. Step 5: Solve for x
    x = 378,040,765,948.38/661,631.40
  6. Step 6: Final answer
    x = 571,376.70

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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.