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Finding the Fourth Proportional to 421,587.60, 582,031.60 and 278,761.92

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Solution

The fourth proportional to 421,587.60, 582,031.60 and 278,761.92 is: 384,850.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,587.60 : 582,031.60 = 278,761.92 : x
  2. Step 2: Convert to fraction form
    421,587.60/582,031.60 = 278,761.92/x
  3. Step 3: Cross multiply
    421,587.60x = 582,031.60 × 278,761.92
  4. Step 4: Simplify right side
    421,587.60x = 162,248,246,316.67
  5. Step 5: Solve for x
    x = 162,248,246,316.67/421,587.60
  6. Step 6: Final answer
    x = 384,850.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.