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Finding the Fourth Proportional to 399,001.12, 550,621.32 and 255,761.08

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Solution

The fourth proportional to 399,001.12, 550,621.32 and 255,761.08 is: 352,950.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,001.12 : 550,621.32 = 255,761.08 : x
  2. Step 2: Convert to fraction form
    399,001.12/550,621.32 = 255,761.08/x
  3. Step 3: Cross multiply
    399,001.12x = 550,621.32 × 255,761.08
  4. Step 4: Simplify right side
    399,001.12x = 140,827,503,474.23
  5. Step 5: Solve for x
    x = 140,827,503,474.23/399,001.12
  6. Step 6: Final answer
    x = 352,950.15

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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.