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Finding the Fourth Proportional to 715,837, 987,829.88 and 393,544.76

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Solution

The fourth proportional to 715,837, 987,829.88 and 393,544.76 is: 543,077.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,837 : 987,829.88 = 393,544.76 : x
  2. Step 2: Convert to fraction form
    715,837/987,829.88 = 393,544.76/x
  3. Step 3: Cross multiply
    715,837x = 987,829.88 × 393,544.76
  4. Step 4: Simplify right side
    715,837x = 388,755,273,045.43
  5. Step 5: Solve for x
    x = 388,755,273,045.43/715,837
  6. Step 6: Final answer
    x = 543,077.93

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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.