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Finding the Fourth Proportional to 399,556, 551,387.28 and 220,708

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Solution

The fourth proportional to 399,556, 551,387.28 and 220,708 is: 304,577.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,556 : 551,387.28 = 220,708 : x
  2. Step 2: Convert to fraction form
    399,556/551,387.28 = 220,708/x
  3. Step 3: Cross multiply
    399,556x = 551,387.28 × 220,708
  4. Step 4: Simplify right side
    399,556x = 121,695,583,794.24
  5. Step 5: Solve for x
    x = 121,695,583,794.24/399,556
  6. Step 6: Final answer
    x = 304,577.04

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.