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Finding the Fourth Proportional to 741.56, 1,114.61 and 686.16

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Solution

The fourth proportional to 741.56, 1,114.61 and 686.16 is: 1,031.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.56 : 1,114.61 = 686.16 : x
  2. Step 2: Convert to fraction form
    741.56/1,114.61 = 686.16/x
  3. Step 3: Cross multiply
    741.56x = 1,114.61 × 686.16
  4. Step 4: Simplify right side
    741.56x = 764,797.37
  5. Step 5: Solve for x
    x = 764,797.37/741.56
  6. Step 6: Final answer
    x = 1,031.34

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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.