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Finding the Fourth Proportional to 398,401.90, 549,787.22 and 217,115.08

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Solution

The fourth proportional to 398,401.90, 549,787.22 and 217,115.08 is: 299,614.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,401.90 : 549,787.22 = 217,115.08 : x
  2. Step 2: Convert to fraction form
    398,401.90/549,787.22 = 217,115.08/x
  3. Step 3: Cross multiply
    398,401.90x = 549,787.22 × 217,115.08
  4. Step 4: Simplify right side
    398,401.90x = 119,367,096,253.28
  5. Step 5: Solve for x
    x = 119,367,096,253.28/398,401.90
  6. Step 6: Final answer
    x = 299,614.78

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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.