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Finding the Fourth Proportional to 440,909.28, 658,369.41 and 428,951.88

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Solution

The fourth proportional to 440,909.28, 658,369.41 and 428,951.88 is: 640,514.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,909.28 : 658,369.41 = 428,951.88 : x
  2. Step 2: Convert to fraction form
    440,909.28/658,369.41 = 428,951.88/x
  3. Step 3: Cross multiply
    440,909.28x = 658,369.41 × 428,951.88
  4. Step 4: Simplify right side
    440,909.28x = 282,408,796,153.99
  5. Step 5: Solve for x
    x = 282,408,796,153.99/440,909.28
  6. Step 6: Final answer
    x = 640,514.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.