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Finding the Fourth Proportional to 280,653.44, 421,046.56 and 91,113.44

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Solution

The fourth proportional to 280,653.44, 421,046.56 and 91,113.44 is: 136,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,653.44 : 421,046.56 = 91,113.44 : x
  2. Step 2: Convert to fraction form
    280,653.44/421,046.56 = 91,113.44/x
  3. Step 3: Cross multiply
    280,653.44x = 421,046.56 × 91,113.44
  4. Step 4: Simplify right side
    280,653.44x = 38,363,000,346.30
  5. Step 5: Solve for x
    x = 38,363,000,346.30/280,653.44
  6. Step 6: Final answer
    x = 136,691.72

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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.