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Finding the Fourth Proportional to 387,771.60, 581,657.40 and 255,061.20

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Solution

The fourth proportional to 387,771.60, 581,657.40 and 255,061.20 is: 382,591.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,771.60 : 581,657.40 = 255,061.20 : x
  2. Step 2: Convert to fraction form
    387,771.60/581,657.40 = 255,061.20/x
  3. Step 3: Cross multiply
    387,771.60x = 581,657.40 × 255,061.20
  4. Step 4: Simplify right side
    387,771.60x = 148,358,234,432.88
  5. Step 5: Solve for x
    x = 148,358,234,432.88/387,771.60
  6. Step 6: Final answer
    x = 382,591.80

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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.