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Finding the Fourth Proportional to 925.06, 1,393.01 and 666.85

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Solution

The fourth proportional to 925.06, 1,393.01 and 666.85 is: 1,004.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.06 : 1,393.01 = 666.85 : x
  2. Step 2: Convert to fraction form
    925.06/1,393.01 = 666.85/x
  3. Step 3: Cross multiply
    925.06x = 1,393.01 × 666.85
  4. Step 4: Simplify right side
    925.06x = 928,922.08
  5. Step 5: Solve for x
    x = 928,922.08/925.06
  6. Step 6: Final answer
    x = 1,004.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.