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Finding the Fourth Proportional to 524.80, 787.20 and 460.80

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Solution

The fourth proportional to 524.80, 787.20 and 460.80 is: 691.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.80 : 787.20 = 460.80 : x
  2. Step 2: Convert to fraction form
    524.80/787.20 = 460.80/x
  3. Step 3: Cross multiply
    524.80x = 787.20 × 460.80
  4. Step 4: Simplify right side
    524.80x = 362,741.76
  5. Step 5: Solve for x
    x = 362,741.76/524.80
  6. Step 6: Final answer
    x = 691.20

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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.