Home / 715,724.87-987,712.59-393,448.55

Finding the Fourth Proportional to 715,724.87, 987,712.59 and 393,448.55

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Solution

The fourth proportional to 715,724.87, 987,712.59 and 393,448.55 is: 542,965.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,724.87 : 987,712.59 = 393,448.55 : x
  2. Step 2: Convert to fraction form
    715,724.87/987,712.59 = 393,448.55/x
  3. Step 3: Cross multiply
    715,724.87x = 987,712.59 × 393,448.55
  4. Step 4: Simplify right side
    715,724.87x = 388,614,081,413.68
  5. Step 5: Solve for x
    x = 388,614,081,413.68/715,724.87
  6. Step 6: Final answer
    x = 542,965.74

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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.