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Finding the Fourth Proportional to 656,871.20, 985,695.60 and 432,879.20

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Solution

The fourth proportional to 656,871.20, 985,695.60 and 432,879.20 is: 649,575.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,871.20 : 985,695.60 = 432,879.20 : x
  2. Step 2: Convert to fraction form
    656,871.20/985,695.60 = 432,879.20/x
  3. Step 3: Cross multiply
    656,871.20x = 985,695.60 × 432,879.20
  4. Step 4: Simplify right side
    656,871.20x = 426,687,122,771.52
  5. Step 5: Solve for x
    x = 426,687,122,771.52/656,871.20
  6. Step 6: Final answer
    x = 649,575.02

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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.