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Finding the Fourth Proportional to 1,773.32, 2,660.88 and 678.38

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Solution

The fourth proportional to 1,773.32, 2,660.88 and 678.38 is: 1,017.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,773.32 : 2,660.88 = 678.38 : x
  2. Step 2: Convert to fraction form
    1,773.32/2,660.88 = 678.38/x
  3. Step 3: Cross multiply
    1,773.32x = 2,660.88 × 678.38
  4. Step 4: Simplify right side
    1,773.32x = 1,805,087.77
  5. Step 5: Solve for x
    x = 1,805,087.77/1,773.32
  6. Step 6: Final answer
    x = 1,017.91

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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.