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Finding the Fourth Proportional to 715,949.94, 988,010.73 and 393,680.91

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Solution

The fourth proportional to 715,949.94, 988,010.73 and 393,680.91 is: 543,279.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,949.94 : 988,010.73 = 393,680.91 : x
  2. Step 2: Convert to fraction form
    715,949.94/988,010.73 = 393,680.91/x
  3. Step 3: Cross multiply
    715,949.94x = 988,010.73 × 393,680.91
  4. Step 4: Simplify right side
    715,949.94x = 388,960,963,276.16
  5. Step 5: Solve for x
    x = 388,960,963,276.16/715,949.94
  6. Step 6: Final answer
    x = 543,279.55

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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.