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Finding the Fourth Proportional to 265,915.90, 398,910.30 and 88,404.40

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Solution

The fourth proportional to 265,915.90, 398,910.30 and 88,404.40 is: 132,618.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,915.90 : 398,910.30 = 88,404.40 : x
  2. Step 2: Convert to fraction form
    265,915.90/398,910.30 = 88,404.40/x
  3. Step 3: Cross multiply
    265,915.90x = 398,910.30 × 88,404.40
  4. Step 4: Simplify right side
    265,915.90x = 35,265,425,725.32
  5. Step 5: Solve for x
    x = 35,265,425,725.32/265,915.90
  6. Step 6: Final answer
    x = 132,618.72

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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.