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Finding the Fourth Proportional to 524.66, 786.21 and 478.56

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Solution

The fourth proportional to 524.66, 786.21 and 478.56 is: 717.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.66 : 786.21 = 478.56 : x
  2. Step 2: Convert to fraction form
    524.66/786.21 = 478.56/x
  3. Step 3: Cross multiply
    524.66x = 786.21 × 478.56
  4. Step 4: Simplify right side
    524.66x = 376,248.66
  5. Step 5: Solve for x
    x = 376,248.66/524.66
  6. Step 6: Final answer
    x = 717.14

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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.