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Finding the Fourth Proportional to 338,873.70, 508,512.15 and 128,532.90

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Solution

The fourth proportional to 338,873.70, 508,512.15 and 128,532.90 is: 192,875.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,873.70 : 508,512.15 = 128,532.90 : x
  2. Step 2: Convert to fraction form
    338,873.70/508,512.15 = 128,532.90/x
  3. Step 3: Cross multiply
    338,873.70x = 508,512.15 × 128,532.90
  4. Step 4: Simplify right side
    338,873.70x = 65,360,541,324.74
  5. Step 5: Solve for x
    x = 65,360,541,324.74/338,873.70
  6. Step 6: Final answer
    x = 192,875.82

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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.