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Finding the Fourth Proportional to 403,676.10, 605,514.15 and 137,445.30

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Solution

The fourth proportional to 403,676.10, 605,514.15 and 137,445.30 is: 206,167.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,676.10 : 605,514.15 = 137,445.30 : x
  2. Step 2: Convert to fraction form
    403,676.10/605,514.15 = 137,445.30/x
  3. Step 3: Cross multiply
    403,676.10x = 605,514.15 × 137,445.30
  4. Step 4: Simplify right side
    403,676.10x = 83,225,074,001.00
  5. Step 5: Solve for x
    x = 83,225,074,001.00/403,676.10
  6. Step 6: Final answer
    x = 206,167.95

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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.