Home / 431,207,999.70-646,811,999.55-172,295,193.30

Finding the Fourth Proportional to 431,207,999.70, 646,811,999.55 and 172,295,193.30

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Solution

The fourth proportional to 431,207,999.70, 646,811,999.55 and 172,295,193.30 is: 258,442,789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,207,999.70 : 646,811,999.55 = 172,295,193.30 : x
  2. Step 2: Convert to fraction form
    431,207,999.70/646,811,999.55 = 172,295,193.30/x
  3. Step 3: Cross multiply
    431,207,999.70x = 646,811,999.55 × 172,295,193.30
  4. Step 4: Simplify right side
    431,207,999.70x = 111,442,598,491,226,768
  5. Step 5: Solve for x
    x = 111,442,598,491,226,768/431,207,999.70
  6. Step 6: Final answer
    x = 258,442,789.95

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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.