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Finding the Fourth Proportional to 715,842.89, 987,854.29 and 393,550.17

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Solution

The fourth proportional to 715,842.89, 987,854.29 and 393,550.17 is: 543,094.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,842.89 : 987,854.29 = 393,550.17 : x
  2. Step 2: Convert to fraction form
    715,842.89/987,854.29 = 393,550.17/x
  3. Step 3: Cross multiply
    715,842.89x = 987,854.29 × 393,550.17
  4. Step 4: Simplify right side
    715,842.89x = 388,770,223,764.73
  5. Step 5: Solve for x
    x = 388,770,223,764.73/715,842.89
  6. Step 6: Final answer
    x = 543,094.34

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1.5x scale

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.