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Finding the Fourth Proportional to 549,439.49, 825,422.43 and 387,705.71

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Solution

The fourth proportional to 549,439.49, 825,422.43 and 387,705.71 is: 582,449.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,439.49 : 825,422.43 = 387,705.71 : x
  2. Step 2: Convert to fraction form
    549,439.49/825,422.43 = 387,705.71/x
  3. Step 3: Cross multiply
    549,439.49x = 825,422.43 × 387,705.71
  4. Step 4: Simplify right side
    549,439.49x = 320,020,985,145.96
  5. Step 5: Solve for x
    x = 320,020,985,145.96/549,439.49
  6. Step 6: Final answer
    x = 582,449.92

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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.