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Finding the Fourth Proportional to 715,925.16, 988,002.18 and 393,659.82

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Solution

The fourth proportional to 715,925.16, 988,002.18 and 393,659.82 is: 543,264.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,925.16 : 988,002.18 = 393,659.82 : x
  2. Step 2: Convert to fraction form
    715,925.16/988,002.18 = 393,659.82/x
  3. Step 3: Cross multiply
    715,925.16x = 988,002.18 × 393,659.82
  4. Step 4: Simplify right side
    715,925.16x = 388,936,760,338.41
  5. Step 5: Solve for x
    x = 388,936,760,338.41/715,925.16
  6. Step 6: Final answer
    x = 543,264.55

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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.