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Finding the Fourth Proportional to 398,318.10, 549,672.06 and 217,031.52

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Solution

The fourth proportional to 398,318.10, 549,672.06 and 217,031.52 is: 299,499.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,318.10 : 549,672.06 = 217,031.52 : x
  2. Step 2: Convert to fraction form
    398,318.10/549,672.06 = 217,031.52/x
  3. Step 3: Cross multiply
    398,318.10x = 549,672.06 × 217,031.52
  4. Step 4: Simplify right side
    398,318.10x = 119,296,162,683.33
  5. Step 5: Solve for x
    x = 119,296,162,683.33/398,318.10
  6. Step 6: Final answer
    x = 299,499.73

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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.