Home / 1,655.18-2,480.85-680.07

Finding the Fourth Proportional to 1,655.18, 2,480.85 and 680.07

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Solution

The fourth proportional to 1,655.18, 2,480.85 and 680.07 is: 1,019.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.18 : 2,480.85 = 680.07 : x
  2. Step 2: Convert to fraction form
    1,655.18/2,480.85 = 680.07/x
  3. Step 3: Cross multiply
    1,655.18x = 2,480.85 × 680.07
  4. Step 4: Simplify right side
    1,655.18x = 1,687,151.66
  5. Step 5: Solve for x
    x = 1,687,151.66/1,655.18
  6. Step 6: Final answer
    x = 1,019.32

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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.