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Finding the Fourth Proportional to 547.68, 821.52 and 291.12

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Solution

The fourth proportional to 547.68, 821.52 and 291.12 is: 436.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.68 : 821.52 = 291.12 : x
  2. Step 2: Convert to fraction form
    547.68/821.52 = 291.12/x
  3. Step 3: Cross multiply
    547.68x = 821.52 × 291.12
  4. Step 4: Simplify right side
    547.68x = 239,160.90
  5. Step 5: Solve for x
    x = 239,160.90/547.68
  6. Step 6: Final answer
    x = 436.68

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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.