Home / 715,621.54-987,559.88-393,364.66

Finding the Fourth Proportional to 715,621.54, 987,559.88 and 393,364.66

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Solution

The fourth proportional to 715,621.54, 987,559.88 and 393,364.66 is: 542,844.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,621.54 : 987,559.88 = 393,364.66 : x
  2. Step 2: Convert to fraction form
    715,621.54/987,559.88 = 393,364.66/x
  3. Step 3: Cross multiply
    715,621.54x = 987,559.88 × 393,364.66
  4. Step 4: Simplify right side
    715,621.54x = 388,471,156,425.84
  5. Step 5: Solve for x
    x = 388,471,156,425.84/715,621.54
  6. Step 6: Final answer
    x = 542,844.42

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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.