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Finding the Fourth Proportional to 265,939.90, 398,946.30 and 88,428.40

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Solution

The fourth proportional to 265,939.90, 398,946.30 and 88,428.40 is: 132,654.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,939.90 : 398,946.30 = 88,428.40 : x
  2. Step 2: Convert to fraction form
    265,939.90/398,946.30 = 88,428.40/x
  3. Step 3: Cross multiply
    265,939.90x = 398,946.30 × 88,428.40
  4. Step 4: Simplify right side
    265,939.90x = 35,278,182,994.92
  5. Step 5: Solve for x
    x = 35,278,182,994.92/265,939.90
  6. Step 6: Final answer
    x = 132,654.72

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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.