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Finding the Fourth Proportional to 388,455.70, 582,684.90 and 107,972.68

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Solution

The fourth proportional to 388,455.70, 582,684.90 and 107,972.68 is: 161,959.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,455.70 : 582,684.90 = 107,972.68 : x
  2. Step 2: Convert to fraction form
    388,455.70/582,684.90 = 107,972.68/x
  3. Step 3: Cross multiply
    388,455.70x = 582,684.90 × 107,972.68
  4. Step 4: Simplify right side
    388,455.70x = 62,914,050,248.53
  5. Step 5: Solve for x
    x = 62,914,050,248.53/388,455.70
  6. Step 6: Final answer
    x = 161,959.40

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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.