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Finding the Fourth Proportional to 398,517.51, 549,950.58 and 217,229.43

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Solution

The fourth proportional to 398,517.51, 549,950.58 and 217,229.43 is: 299,774.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,517.51 : 549,950.58 = 217,229.43 : x
  2. Step 2: Convert to fraction form
    398,517.51/549,950.58 = 217,229.43/x
  3. Step 3: Cross multiply
    398,517.51x = 549,950.58 × 217,229.43
  4. Step 4: Simplify right side
    398,517.51x = 119,465,451,021.57
  5. Step 5: Solve for x
    x = 119,465,451,021.57/398,517.51
  6. Step 6: Final answer
    x = 299,774.66

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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.