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Finding the Fourth Proportional to 398,463.15, 549,879.56 and 217,175.23

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Solution

The fourth proportional to 398,463.15, 549,879.56 and 217,175.23 is: 299,702.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,463.15 : 549,879.56 = 217,175.23 : x
  2. Step 2: Convert to fraction form
    398,463.15/549,879.56 = 217,175.23/x
  3. Step 3: Cross multiply
    398,463.15x = 549,879.56 × 217,175.23
  4. Step 4: Simplify right side
    398,463.15x = 119,420,217,848.91
  5. Step 5: Solve for x
    x = 119,420,217,848.91/398,463.15
  6. Step 6: Final answer
    x = 299,702.04

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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.