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Finding the Fourth Proportional to 398,418.83, 549,801.92 and 217,126.85

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Solution

The fourth proportional to 398,418.83, 549,801.92 and 217,126.85 is: 299,626.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,418.83 : 549,801.92 = 217,126.85 : x
  2. Step 2: Convert to fraction form
    398,418.83/549,801.92 = 217,126.85/x
  3. Step 3: Cross multiply
    398,418.83x = 549,801.92 × 217,126.85
  4. Step 4: Simplify right side
    398,418.83x = 119,376,759,013.55
  5. Step 5: Solve for x
    x = 119,376,759,013.55/398,418.83
  6. Step 6: Final answer
    x = 299,626.30

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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.