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Finding the Fourth Proportional to 927.19, 1,389.58 and 694.25

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Solution

The fourth proportional to 927.19, 1,389.58 and 694.25 is: 1,040.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.19 : 1,389.58 = 694.25 : x
  2. Step 2: Convert to fraction form
    927.19/1,389.58 = 694.25/x
  3. Step 3: Cross multiply
    927.19x = 1,389.58 × 694.25
  4. Step 4: Simplify right side
    927.19x = 964,715.92
  5. Step 5: Solve for x
    x = 964,715.92/927.19
  6. Step 6: Final answer
    x = 1,040.47

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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.