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Finding the Fourth Proportional to 1,040.28, 1,555.82 and 925.53

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Solution

The fourth proportional to 1,040.28, 1,555.82 and 925.53 is: 1,384.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.28 : 1,555.82 = 925.53 : x
  2. Step 2: Convert to fraction form
    1,040.28/1,555.82 = 925.53/x
  3. Step 3: Cross multiply
    1,040.28x = 1,555.82 × 925.53
  4. Step 4: Simplify right side
    1,040.28x = 1,439,950.31
  5. Step 5: Solve for x
    x = 1,439,950.31/1,040.28
  6. Step 6: Final answer
    x = 1,384.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.