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Finding the Fourth Proportional to 265,916.40, 398,911.05 and 88,404.90

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Solution

The fourth proportional to 265,916.40, 398,911.05 and 88,404.90 is: 132,619.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,916.40 : 398,911.05 = 88,404.90 : x
  2. Step 2: Convert to fraction form
    265,916.40/398,911.05 = 88,404.90/x
  3. Step 3: Cross multiply
    265,916.40x = 398,911.05 × 88,404.90
  4. Step 4: Simplify right side
    265,916.40x = 35,265,691,484.15
  5. Step 5: Solve for x
    x = 35,265,691,484.15/265,916.40
  6. Step 6: Final answer
    x = 132,619.47

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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.