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Finding the Fourth Proportional to 1,787.76, 2,466.70 and 1,079.72

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Solution

The fourth proportional to 1,787.76, 2,466.70 and 1,079.72 is: 1,489.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.76 : 2,466.70 = 1,079.72 : x
  2. Step 2: Convert to fraction form
    1,787.76/2,466.70 = 1,079.72/x
  3. Step 3: Cross multiply
    1,787.76x = 2,466.70 × 1,079.72
  4. Step 4: Simplify right side
    1,787.76x = 2,663,334.34
  5. Step 5: Solve for x
    x = 2,663,334.34/1,787.76
  6. Step 6: Final answer
    x = 1,489.76

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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.