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Finding the Fourth Proportional to 485,249.68, 725,310.50 and 421,564.24

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Solution

The fourth proportional to 485,249.68, 725,310.50 and 421,564.24 is: 630,118.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,249.68 : 725,310.50 = 421,564.24 : x
  2. Step 2: Convert to fraction form
    485,249.68/725,310.50 = 421,564.24/x
  3. Step 3: Cross multiply
    485,249.68x = 725,310.50 × 421,564.24
  4. Step 4: Simplify right side
    485,249.68x = 305,764,969,696.52
  5. Step 5: Solve for x
    x = 305,764,969,696.52/485,249.68
  6. Step 6: Final answer
    x = 630,118.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.