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Finding the Fourth Proportional to 338,122.72, 506,683.68 and 138,201.76

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Solution

The fourth proportional to 338,122.72, 506,683.68 and 138,201.76 is: 207,098.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,122.72 : 506,683.68 = 138,201.76 : x
  2. Step 2: Convert to fraction form
    338,122.72/506,683.68 = 138,201.76/x
  3. Step 3: Cross multiply
    338,122.72x = 506,683.68 × 138,201.76
  4. Step 4: Simplify right side
    338,122.72x = 70,024,576,339.28
  5. Step 5: Solve for x
    x = 70,024,576,339.28/338,122.72
  6. Step 6: Final answer
    x = 207,098.11

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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.