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Finding the Fourth Proportional to 878,974,877.90, 1,318,672,268.85 and 265,565,117.90

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Solution

The fourth proportional to 878,974,877.90, 1,318,672,268.85 and 265,565,117.90 is: 398,411,109.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,974,877.90 : 1,318,672,268.85 = 265,565,117.90 : x
  2. Step 2: Convert to fraction form
    878,974,877.90/1,318,672,268.85 = 265,565,117.90/x
  3. Step 3: Cross multiply
    878,974,877.90x = 1,318,672,268.85 × 265,565,117.90
  4. Step 4: Simplify right side
    878,974,877.90x = 350,193,356,548,610,752
  5. Step 5: Solve for x
    x = 350,193,356,548,610,752/878,974,877.90
  6. Step 6: Final answer
    x = 398,411,109.75

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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.