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Finding the Fourth Proportional to 925.67, 1,276.10 and 571.36

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Solution

The fourth proportional to 925.67, 1,276.10 and 571.36 is: 787.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.67 : 1,276.10 = 571.36 : x
  2. Step 2: Convert to fraction form
    925.67/1,276.10 = 571.36/x
  3. Step 3: Cross multiply
    925.67x = 1,276.10 × 571.36
  4. Step 4: Simplify right side
    925.67x = 729,112.50
  5. Step 5: Solve for x
    x = 729,112.50/925.67
  6. Step 6: Final answer
    x = 787.66

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1.5x scale

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.