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Finding the Fourth Proportional to 439,909.80, 659,864.70 and 400,543.80

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Solution

The fourth proportional to 439,909.80, 659,864.70 and 400,543.80 is: 600,815.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,909.80 : 659,864.70 = 400,543.80 : x
  2. Step 2: Convert to fraction form
    439,909.80/659,864.70 = 400,543.80/x
  3. Step 3: Cross multiply
    439,909.80x = 659,864.70 × 400,543.80
  4. Step 4: Simplify right side
    439,909.80x = 264,304,714,423.86
  5. Step 5: Solve for x
    x = 264,304,714,423.86/439,909.80
  6. Step 6: Final answer
    x = 600,815.70

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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.