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Finding the Fourth Proportional to 787.32, 1,182.33 and 761.40

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Solution

The fourth proportional to 787.32, 1,182.33 and 761.40 is: 1,143.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.32 : 1,182.33 = 761.40 : x
  2. Step 2: Convert to fraction form
    787.32/1,182.33 = 761.40/x
  3. Step 3: Cross multiply
    787.32x = 1,182.33 × 761.40
  4. Step 4: Simplify right side
    787.32x = 900,226.06
  5. Step 5: Solve for x
    x = 900,226.06/787.32
  6. Step 6: Final answer
    x = 1,143.41

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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.