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Finding the Fourth Proportional to 524.80, 787.56 and 380.56

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Solution

The fourth proportional to 524.80, 787.56 and 380.56 is: 571.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.80 : 787.56 = 380.56 : x
  2. Step 2: Convert to fraction form
    524.80/787.56 = 380.56/x
  3. Step 3: Cross multiply
    524.80x = 787.56 × 380.56
  4. Step 4: Simplify right side
    524.80x = 299,713.83
  5. Step 5: Solve for x
    x = 299,713.83/524.80
  6. Step 6: Final answer
    x = 571.10

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1.5x scale

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.