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Finding the Fourth Proportional to 575.68, 863.52 and 318.40

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Solution

The fourth proportional to 575.68, 863.52 and 318.40 is: 477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.68 : 863.52 = 318.40 : x
  2. Step 2: Convert to fraction form
    575.68/863.52 = 318.40/x
  3. Step 3: Cross multiply
    575.68x = 863.52 × 318.40
  4. Step 4: Simplify right side
    575.68x = 274,944.77
  5. Step 5: Solve for x
    x = 274,944.77/575.68
  6. Step 6: Final answer
    x = 477.60

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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.