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Finding the Fourth Proportional to 710,221.95, 980,129.84 and 387,962.10

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Solution

The fourth proportional to 710,221.95, 980,129.84 and 387,962.10 is: 535,400.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,221.95 : 980,129.84 = 387,962.10 : x
  2. Step 2: Convert to fraction form
    710,221.95/980,129.84 = 387,962.10/x
  3. Step 3: Cross multiply
    710,221.95x = 980,129.84 × 387,962.10
  4. Step 4: Simplify right side
    710,221.95x = 380,253,229,059.25
  5. Step 5: Solve for x
    x = 380,253,229,059.25/710,221.95
  6. Step 6: Final answer
    x = 535,400.56

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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.