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Finding the Fourth Proportional to 787.01, 1,180.00 and 440.38

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Solution

The fourth proportional to 787.01, 1,180.00 and 440.38 is: 660.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.01 : 1,180.00 = 440.38 : x
  2. Step 2: Convert to fraction form
    787.01/1,180.00 = 440.38/x
  3. Step 3: Cross multiply
    787.01x = 1,180.00 × 440.38
  4. Step 4: Simplify right side
    787.01x = 519,646.20
  5. Step 5: Solve for x
    x = 519,646.20/787.01
  6. Step 6: Final answer
    x = 660.28

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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.