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Finding the Fourth Proportional to 925.60, 1,381.16 and 903.64

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Solution

The fourth proportional to 925.60, 1,381.16 and 903.64 is: 1,348.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.60 : 1,381.16 = 903.64 : x
  2. Step 2: Convert to fraction form
    925.60/1,381.16 = 903.64/x
  3. Step 3: Cross multiply
    925.60x = 1,381.16 × 903.64
  4. Step 4: Simplify right side
    925.60x = 1,248,071.42
  5. Step 5: Solve for x
    x = 1,248,071.42/925.60
  6. Step 6: Final answer
    x = 1,348.39

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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.