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Finding the Fourth Proportional to 341,755.20, 512,688.24 and 128,539.80

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Solution

The fourth proportional to 341,755.20, 512,688.24 and 128,539.80 is: 192,830.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,755.20 : 512,688.24 = 128,539.80 : x
  2. Step 2: Convert to fraction form
    341,755.20/512,688.24 = 128,539.80/x
  3. Step 3: Cross multiply
    341,755.20x = 512,688.24 × 128,539.80
  4. Step 4: Simplify right side
    341,755.20x = 65,900,843,831.95
  5. Step 5: Solve for x
    x = 65,900,843,831.95/341,755.20
  6. Step 6: Final answer
    x = 192,830.55

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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.