Home / 715,949.27-988,013.67-393,680.15

Finding the Fourth Proportional to 715,949.27, 988,013.67 and 393,680.15

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Solution

The fourth proportional to 715,949.27, 988,013.67 and 393,680.15 is: 543,280.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,949.27 : 988,013.67 = 393,680.15 : x
  2. Step 2: Convert to fraction form
    715,949.27/988,013.67 = 393,680.15/x
  3. Step 3: Cross multiply
    715,949.27x = 988,013.67 × 393,680.15
  4. Step 4: Simplify right side
    715,949.27x = 388,961,369,807.65
  5. Step 5: Solve for x
    x = 388,961,369,807.65/715,949.27
  6. Step 6: Final answer
    x = 543,280.63

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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.