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Finding the Fourth Proportional to 398,079.72, 549,344.52 and 225,996.21

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Solution

The fourth proportional to 398,079.72, 549,344.52 and 225,996.21 is: 311,871.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,079.72 : 549,344.52 = 225,996.21 : x
  2. Step 2: Convert to fraction form
    398,079.72/549,344.52 = 225,996.21/x
  3. Step 3: Cross multiply
    398,079.72x = 549,344.52 × 225,996.21
  4. Step 4: Simplify right side
    398,079.72x = 124,149,779,504.27
  5. Step 5: Solve for x
    x = 124,149,779,504.27/398,079.72
  6. Step 6: Final answer
    x = 311,871.65

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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.