Home / 715,865.28-987,900.84-393,577.62

Finding the Fourth Proportional to 715,865.28, 987,900.84 and 393,577.62

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Solution

The fourth proportional to 715,865.28, 987,900.84 and 393,577.62 is: 543,140.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,865.28 : 987,900.84 = 393,577.62 : x
  2. Step 2: Convert to fraction form
    715,865.28/987,900.84 = 393,577.62/x
  3. Step 3: Cross multiply
    715,865.28x = 987,900.84 × 393,577.62
  4. Step 4: Simplify right side
    715,865.28x = 388,815,661,403.20
  5. Step 5: Solve for x
    x = 388,815,661,403.20/715,865.28
  6. Step 6: Final answer
    x = 543,140.83

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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.