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Finding the Fourth Proportional to 925.40, 1,275.90 and 799.40

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Solution

The fourth proportional to 925.40, 1,275.90 and 799.40 is: 1,102.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.40 : 1,275.90 = 799.40 : x
  2. Step 2: Convert to fraction form
    925.40/1,275.90 = 799.40/x
  3. Step 3: Cross multiply
    925.40x = 1,275.90 × 799.40
  4. Step 4: Simplify right side
    925.40x = 1,019,954.65
  5. Step 5: Solve for x
    x = 1,019,954.65/925.40
  6. Step 6: Final answer
    x = 1,102.17

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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.