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Finding the Fourth Proportional to 524.08, 786.30 and 318.79

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Solution

The fourth proportional to 524.08, 786.30 and 318.79 is: 478.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.08 : 786.30 = 318.79 : x
  2. Step 2: Convert to fraction form
    524.08/786.30 = 318.79/x
  3. Step 3: Cross multiply
    524.08x = 786.30 × 318.79
  4. Step 4: Simplify right side
    524.08x = 250,664.58
  5. Step 5: Solve for x
    x = 250,664.58/524.08
  6. Step 6: Final answer
    x = 478.29

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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.