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Finding the Fourth Proportional to 442,903.40, 664,355.10 and 354,329.90

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Solution

The fourth proportional to 442,903.40, 664,355.10 and 354,329.90 is: 531,494.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,903.40 : 664,355.10 = 354,329.90 : x
  2. Step 2: Convert to fraction form
    442,903.40/664,355.10 = 354,329.90/x
  3. Step 3: Cross multiply
    442,903.40x = 664,355.10 × 354,329.90
  4. Step 4: Simplify right side
    442,903.40x = 235,400,876,147.49
  5. Step 5: Solve for x
    x = 235,400,876,147.49/442,903.40
  6. Step 6: Final answer
    x = 531,494.85

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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.