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Finding the Fourth Proportional to 398,512.82, 549,939.49 and 217,223.19

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Solution

The fourth proportional to 398,512.82, 549,939.49 and 217,223.19 is: 299,763.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,512.82 : 549,939.49 = 217,223.19 : x
  2. Step 2: Convert to fraction form
    398,512.82/549,939.49 = 217,223.19/x
  3. Step 3: Cross multiply
    398,512.82x = 549,939.49 × 217,223.19
  4. Step 4: Simplify right side
    398,512.82x = 119,459,609,781.72
  5. Step 5: Solve for x
    x = 119,459,609,781.72/398,512.82
  6. Step 6: Final answer
    x = 299,763.53

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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.