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Finding the Fourth Proportional to 715,543.41, 987,473.58 and 393,264.93

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Solution

The fourth proportional to 715,543.41, 987,473.58 and 393,264.93 is: 542,718.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,543.41 : 987,473.58 = 393,264.93 : x
  2. Step 2: Convert to fraction form
    715,543.41/987,473.58 = 393,264.93/x
  3. Step 3: Cross multiply
    715,543.41x = 987,473.58 × 393,264.93
  4. Step 4: Simplify right side
    715,543.41x = 388,338,723,378.18
  5. Step 5: Solve for x
    x = 388,338,723,378.18/715,543.41
  6. Step 6: Final answer
    x = 542,718.61

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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.