Home / 1,678.32-2,517.49-445.71

Finding the Fourth Proportional to 1,678.32, 2,517.49 and 445.71

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Solution

The fourth proportional to 1,678.32, 2,517.49 and 445.71 is: 668.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.32 : 2,517.49 = 445.71 : x
  2. Step 2: Convert to fraction form
    1,678.32/2,517.49 = 445.71/x
  3. Step 3: Cross multiply
    1,678.32x = 2,517.49 × 445.71
  4. Step 4: Simplify right side
    1,678.32x = 1,122,070.47
  5. Step 5: Solve for x
    x = 1,122,070.47/1,678.32
  6. Step 6: Final answer
    x = 668.57

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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.