Home / 1,711.27-2,566.71-478.78

Finding the Fourth Proportional to 1,711.27, 2,566.71 and 478.78

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Solution

The fourth proportional to 1,711.27, 2,566.71 and 478.78 is: 718.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.27 : 2,566.71 = 478.78 : x
  2. Step 2: Convert to fraction form
    1,711.27/2,566.71 = 478.78/x
  3. Step 3: Cross multiply
    1,711.27x = 2,566.71 × 478.78
  4. Step 4: Simplify right side
    1,711.27x = 1,228,878.61
  5. Step 5: Solve for x
    x = 1,228,878.61/1,711.27
  6. Step 6: Final answer
    x = 718.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.