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Finding the Fourth Proportional to 265,321.12, 397,981.68 and 87,780.48

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Solution

The fourth proportional to 265,321.12, 397,981.68 and 87,780.48 is: 131,670.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,321.12 : 397,981.68 = 87,780.48 : x
  2. Step 2: Convert to fraction form
    265,321.12/397,981.68 = 87,780.48/x
  3. Step 3: Cross multiply
    265,321.12x = 397,981.68 × 87,780.48
  4. Step 4: Simplify right side
    265,321.12x = 34,935,022,901.61
  5. Step 5: Solve for x
    x = 34,935,022,901.61/265,321.12
  6. Step 6: Final answer
    x = 131,670.72

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Similar ratio
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1.5x scale

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.