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Finding the Fourth Proportional to 878,974,884.90, 1,318,672,279.35 and 265,565,124.90

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Solution

The fourth proportional to 878,974,884.90, 1,318,672,279.35 and 265,565,124.90 is: 398,411,120.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,974,884.90 : 1,318,672,279.35 = 265,565,124.90 : x
  2. Step 2: Convert to fraction form
    878,974,884.90/1,318,672,279.35 = 265,565,124.90/x
  3. Step 3: Cross multiply
    878,974,884.90x = 1,318,672,279.35 × 265,565,124.90
  4. Step 4: Simplify right side
    878,974,884.90x = 350,193,368,567,750,400
  5. Step 5: Solve for x
    x = 350,193,368,567,750,400/878,974,884.90
  6. Step 6: Final answer
    x = 398,411,120.25

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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.