Home / 1,680-2,515.08-1,131.18

Finding the Fourth Proportional to 1,680, 2,515.08 and 1,131.18

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Solution

The fourth proportional to 1,680, 2,515.08 and 1,131.18 is: 1,693.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680 : 2,515.08 = 1,131.18 : x
  2. Step 2: Convert to fraction form
    1,680/2,515.08 = 1,131.18/x
  3. Step 3: Cross multiply
    1,680x = 2,515.08 × 1,131.18
  4. Step 4: Simplify right side
    1,680x = 2,845,008.19
  5. Step 5: Solve for x
    x = 2,845,008.19/1,680
  6. Step 6: Final answer
    x = 1,693.46

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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.