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Finding the Fourth Proportional to 321,139.66, 482,447.90 and 226,587.74

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Solution

The fourth proportional to 321,139.66, 482,447.90 and 226,587.74 is: 340,402.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,139.66 : 482,447.90 = 226,587.74 : x
  2. Step 2: Convert to fraction form
    321,139.66/482,447.90 = 226,587.74/x
  3. Step 3: Cross multiply
    321,139.66x = 482,447.90 × 226,587.74
  4. Step 4: Simplify right side
    321,139.66x = 109,316,779,328.75
  5. Step 5: Solve for x
    x = 109,316,779,328.75/321,139.66
  6. Step 6: Final answer
    x = 340,402.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.