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Finding the Fourth Proportional to 925.07, 1,274.67 and 688.55

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Solution

The fourth proportional to 925.07, 1,274.67 and 688.55 is: 948.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.07 : 1,274.67 = 688.55 : x
  2. Step 2: Convert to fraction form
    925.07/1,274.67 = 688.55/x
  3. Step 3: Cross multiply
    925.07x = 1,274.67 × 688.55
  4. Step 4: Simplify right side
    925.07x = 877,667.66
  5. Step 5: Solve for x
    x = 877,667.66/925.07
  6. Step 6: Final answer
    x = 948.76

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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.