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Finding the Fourth Proportional to 488,399.60, 731,724.60 and 418,415.60

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Solution

The fourth proportional to 488,399.60, 731,724.60 and 418,415.60 is: 626,873.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,399.60 : 731,724.60 = 418,415.60 : x
  2. Step 2: Convert to fraction form
    488,399.60/731,724.60 = 418,415.60/x
  3. Step 3: Cross multiply
    488,399.60x = 731,724.60 × 418,415.60
  4. Step 4: Simplify right side
    488,399.60x = 306,164,987,543.76
  5. Step 5: Solve for x
    x = 306,164,987,543.76/488,399.60
  6. Step 6: Final answer
    x = 626,873.95

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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.