Home / 1,677.76-2,315.56-979.04

Finding the Fourth Proportional to 1,677.76, 2,315.56 and 979.04

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Solution

The fourth proportional to 1,677.76, 2,315.56 and 979.04 is: 1,351.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,677.76 : 2,315.56 = 979.04 : x
  2. Step 2: Convert to fraction form
    1,677.76/2,315.56 = 979.04/x
  3. Step 3: Cross multiply
    1,677.76x = 2,315.56 × 979.04
  4. Step 4: Simplify right side
    1,677.76x = 2,267,025.86
  5. Step 5: Solve for x
    x = 2,267,025.86/1,677.76
  6. Step 6: Final answer
    x = 1,351.22

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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.