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Finding the Fourth Proportional to 787.74, 1,179.45 and 497.22

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Solution

The fourth proportional to 787.74, 1,179.45 and 497.22 is: 744.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.74 : 1,179.45 = 497.22 : x
  2. Step 2: Convert to fraction form
    787.74/1,179.45 = 497.22/x
  3. Step 3: Cross multiply
    787.74x = 1,179.45 × 497.22
  4. Step 4: Simplify right side
    787.74x = 586,446.13
  5. Step 5: Solve for x
    x = 586,446.13/787.74
  6. Step 6: Final answer
    x = 744.47

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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.