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Finding the Fourth Proportional to 604,909.80, 906,327.90 and 394,439.40

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Solution

The fourth proportional to 604,909.80, 906,327.90 and 394,439.40 is: 590,983.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,909.80 : 906,327.90 = 394,439.40 : x
  2. Step 2: Convert to fraction form
    604,909.80/906,327.90 = 394,439.40/x
  3. Step 3: Cross multiply
    604,909.80x = 906,327.90 × 394,439.40
  4. Step 4: Simplify right side
    604,909.80x = 357,491,433,079.26
  5. Step 5: Solve for x
    x = 357,491,433,079.26/604,909.80
  6. Step 6: Final answer
    x = 590,983.04

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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.