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Finding the Fourth Proportional to 399,600.90, 551,449.20 and 220,752.90

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Solution

The fourth proportional to 399,600.90, 551,449.20 and 220,752.90 is: 304,638.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,600.90 : 551,449.20 = 220,752.90 : x
  2. Step 2: Convert to fraction form
    399,600.90/551,449.20 = 220,752.90/x
  3. Step 3: Cross multiply
    399,600.90x = 551,449.20 × 220,752.90
  4. Step 4: Simplify right side
    399,600.90x = 121,734,010,102.68
  5. Step 5: Solve for x
    x = 121,734,010,102.68/399,600.90
  6. Step 6: Final answer
    x = 304,638.98

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1.5x scale

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.