Home / 438,600.20-656,442.30-318,315.20

Finding the Fourth Proportional to 438,600.20, 656,442.30 and 318,315.20

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Solution

The fourth proportional to 438,600.20, 656,442.30 and 318,315.20 is: 476,414.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,600.20 : 656,442.30 = 318,315.20 : x
  2. Step 2: Convert to fraction form
    438,600.20/656,442.30 = 318,315.20/x
  3. Step 3: Cross multiply
    438,600.20x = 656,442.30 × 318,315.20
  4. Step 4: Simplify right side
    438,600.20x = 208,955,562,012.96
  5. Step 5: Solve for x
    x = 208,955,562,012.96/438,600.20
  6. Step 6: Final answer
    x = 476,414.65

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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.