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Finding the Fourth Proportional to 925.99, 1,277.17 and 678.31

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Solution

The fourth proportional to 925.99, 1,277.17 and 678.31 is: 935.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.99 : 1,277.17 = 678.31 : x
  2. Step 2: Convert to fraction form
    925.99/1,277.17 = 678.31/x
  3. Step 3: Cross multiply
    925.99x = 1,277.17 × 678.31
  4. Step 4: Simplify right side
    925.99x = 866,317.18
  5. Step 5: Solve for x
    x = 866,317.18/925.99
  6. Step 6: Final answer
    x = 935.56

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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.