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Finding the Fourth Proportional to 935.28, 1,395.90 and 925.56

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Solution

The fourth proportional to 935.28, 1,395.90 and 925.56 is: 1,381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.28 : 1,395.90 = 925.56 : x
  2. Step 2: Convert to fraction form
    935.28/1,395.90 = 925.56/x
  3. Step 3: Cross multiply
    935.28x = 1,395.90 × 925.56
  4. Step 4: Simplify right side
    935.28x = 1,291,989.20
  5. Step 5: Solve for x
    x = 1,291,989.20/935.28
  6. Step 6: Final answer
    x = 1,381.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.