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Finding the Fourth Proportional to 644,086.08, 887,376.69 and 498,390.93

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Solution

The fourth proportional to 644,086.08, 887,376.69 and 498,390.93 is: 686,648.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,086.08 : 887,376.69 = 498,390.93 : x
  2. Step 2: Convert to fraction form
    644,086.08/887,376.69 = 498,390.93/x
  3. Step 3: Cross multiply
    644,086.08x = 887,376.69 × 498,390.93
  4. Step 4: Simplify right side
    644,086.08x = 442,260,493,789.42
  5. Step 5: Solve for x
    x = 442,260,493,789.42/644,086.08
  6. Step 6: Final answer
    x = 686,648.12

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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.