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Finding the Fourth Proportional to 399,680.64, 550,524.48 and 278,605.44

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Solution

The fourth proportional to 399,680.64, 550,524.48 and 278,605.44 is: 383,754.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,680.64 : 550,524.48 = 278,605.44 : x
  2. Step 2: Convert to fraction form
    399,680.64/550,524.48 = 278,605.44/x
  3. Step 3: Cross multiply
    399,680.64x = 550,524.48 × 278,605.44
  4. Step 4: Simplify right side
    399,680.64x = 153,379,114,981.17
  5. Step 5: Solve for x
    x = 153,379,114,981.17/399,680.64
  6. Step 6: Final answer
    x = 383,754.18

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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.