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Finding the Fourth Proportional to 398,484.11, 549,903.22 and 217,195.47

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Solution

The fourth proportional to 398,484.11, 549,903.22 and 217,195.47 is: 299,727.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,484.11 : 549,903.22 = 217,195.47 : x
  2. Step 2: Convert to fraction form
    398,484.11/549,903.22 = 217,195.47/x
  3. Step 3: Cross multiply
    398,484.11x = 549,903.22 × 217,195.47
  4. Step 4: Simplify right side
    398,484.11x = 119,436,487,779.43
  5. Step 5: Solve for x
    x = 119,436,487,779.43/398,484.11
  6. Step 6: Final answer
    x = 299,727.10

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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.