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Finding the Fourth Proportional to 1,680.80, 2,320.50 and 1,114.11

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Solution

The fourth proportional to 1,680.80, 2,320.50 and 1,114.11 is: 1,538.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.80 : 2,320.50 = 1,114.11 : x
  2. Step 2: Convert to fraction form
    1,680.80/2,320.50 = 1,114.11/x
  3. Step 3: Cross multiply
    1,680.80x = 2,320.50 × 1,114.11
  4. Step 4: Simplify right side
    1,680.80x = 2,585,292.26
  5. Step 5: Solve for x
    x = 2,585,292.26/1,680.80
  6. Step 6: Final answer
    x = 1,538.14

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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.