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Finding the Fourth Proportional to 515,403.38, 772,915.52 and 178,357.52

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Solution

The fourth proportional to 515,403.38, 772,915.52 and 178,357.52 is: 267,470.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,403.38 : 772,915.52 = 178,357.52 : x
  2. Step 2: Convert to fraction form
    515,403.38/772,915.52 = 178,357.52/x
  3. Step 3: Cross multiply
    515,403.38x = 772,915.52 × 178,357.52
  4. Step 4: Simplify right side
    515,403.38x = 137,855,295,316.71
  5. Step 5: Solve for x
    x = 137,855,295,316.71/515,403.38
  6. Step 6: Final answer
    x = 267,470.69

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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.