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Finding the Fourth Proportional to 474,658.20, 711,987.30 and 443,323.80

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Solution

The fourth proportional to 474,658.20, 711,987.30 and 443,323.80 is: 664,985.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,658.20 : 711,987.30 = 443,323.80 : x
  2. Step 2: Convert to fraction form
    474,658.20/711,987.30 = 443,323.80/x
  3. Step 3: Cross multiply
    474,658.20x = 711,987.30 × 443,323.80
  4. Step 4: Simplify right side
    474,658.20x = 315,640,915,387.74
  5. Step 5: Solve for x
    x = 315,640,915,387.74/474,658.20
  6. Step 6: Final answer
    x = 664,985.70

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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.