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Finding the Fourth Proportional to 318,909.20, 478,363.80 and 244,259.60

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Solution

The fourth proportional to 318,909.20, 478,363.80 and 244,259.60 is: 366,389.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,909.20 : 478,363.80 = 244,259.60 : x
  2. Step 2: Convert to fraction form
    318,909.20/478,363.80 = 244,259.60/x
  3. Step 3: Cross multiply
    318,909.20x = 478,363.80 × 244,259.60
  4. Step 4: Simplify right side
    318,909.20x = 116,844,950,442.48
  5. Step 5: Solve for x
    x = 116,844,950,442.48/318,909.20
  6. Step 6: Final answer
    x = 366,389.40

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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.