Home / 715,868.12-987,872.59-393,575.87

Finding the Fourth Proportional to 715,868.12, 987,872.59 and 393,575.87

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Solution

The fourth proportional to 715,868.12, 987,872.59 and 393,575.87 is: 543,120.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,868.12 : 987,872.59 = 393,575.87 : x
  2. Step 2: Convert to fraction form
    715,868.12/987,872.59 = 393,575.87/x
  3. Step 3: Cross multiply
    715,868.12x = 987,872.59 × 393,575.87
  4. Step 4: Simplify right side
    715,868.12x = 388,802,817,020.06
  5. Step 5: Solve for x
    x = 388,802,817,020.06/715,868.12
  6. Step 6: Final answer
    x = 543,120.73

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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.