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Finding the Fourth Proportional to 578.85, 867.46 and 318.53

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Solution

The fourth proportional to 578.85, 867.46 and 318.53 is: 477.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.85 : 867.46 = 318.53 : x
  2. Step 2: Convert to fraction form
    578.85/867.46 = 318.53/x
  3. Step 3: Cross multiply
    578.85x = 867.46 × 318.53
  4. Step 4: Simplify right side
    578.85x = 276,314.00
  5. Step 5: Solve for x
    x = 276,314.00/578.85
  6. Step 6: Final answer
    x = 477.35

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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.