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Finding the Fourth Proportional to 398,441.39, 549,833.10 and 217,149.43

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Solution

The fourth proportional to 398,441.39, 549,833.10 and 217,149.43 is: 299,657.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,441.39 : 549,833.10 = 217,149.43 : x
  2. Step 2: Convert to fraction form
    398,441.39/549,833.10 = 217,149.43/x
  3. Step 3: Cross multiply
    398,441.39x = 549,833.10 × 217,149.43
  4. Step 4: Simplify right side
    398,441.39x = 119,395,944,323.64
  5. Step 5: Solve for x
    x = 119,395,944,323.64/398,441.39
  6. Step 6: Final answer
    x = 299,657.49

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1.5x scale

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.