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Finding the Fourth Proportional to 387,801.60, 582,139.80 and 299,446.80

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Solution

The fourth proportional to 387,801.60, 582,139.80 and 299,446.80 is: 449,507.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,801.60 : 582,139.80 = 299,446.80 : x
  2. Step 2: Convert to fraction form
    387,801.60/582,139.80 = 299,446.80/x
  3. Step 3: Cross multiply
    387,801.60x = 582,139.80 × 299,446.80
  4. Step 4: Simplify right side
    387,801.60x = 174,319,900,262.64
  5. Step 5: Solve for x
    x = 174,319,900,262.64/387,801.60
  6. Step 6: Final answer
    x = 449,507.94

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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.