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Finding the Fourth Proportional to 524.90, 787.38 and 159.70

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Solution

The fourth proportional to 524.90, 787.38 and 159.70 is: 239.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.90 : 787.38 = 159.70 : x
  2. Step 2: Convert to fraction form
    524.90/787.38 = 159.70/x
  3. Step 3: Cross multiply
    524.90x = 787.38 × 159.70
  4. Step 4: Simplify right side
    524.90x = 125,742.62
  5. Step 5: Solve for x
    x = 125,742.62/524.90
  6. Step 6: Final answer
    x = 239.55

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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.