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Finding the Fourth Proportional to 765,147.92, 1,055,871.72 and 425,615.12

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Solution

The fourth proportional to 765,147.92, 1,055,871.72 and 425,615.12 is: 587,330.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,147.92 : 1,055,871.72 = 425,615.12 : x
  2. Step 2: Convert to fraction form
    765,147.92/1,055,871.72 = 425,615.12/x
  3. Step 3: Cross multiply
    765,147.92x = 1,055,871.72 × 425,615.12
  4. Step 4: Simplify right side
    765,147.92x = 449,394,968,812.41
  5. Step 5: Solve for x
    x = 449,394,968,812.41/765,147.92
  6. Step 6: Final answer
    x = 587,330.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.