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Finding the Fourth Proportional to 399,068, 550,714.56 and 220,220

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Solution

The fourth proportional to 399,068, 550,714.56 and 220,220 is: 303,904.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,068 : 550,714.56 = 220,220 : x
  2. Step 2: Convert to fraction form
    399,068/550,714.56 = 220,220/x
  3. Step 3: Cross multiply
    399,068x = 550,714.56 × 220,220
  4. Step 4: Simplify right side
    399,068x = 121,278,360,403.20
  5. Step 5: Solve for x
    x = 121,278,360,403.20/399,068
  6. Step 6: Final answer
    x = 303,904.00

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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.