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Finding the Fourth Proportional to 488.55, 732.59 and 315.31

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Solution

The fourth proportional to 488.55, 732.59 and 315.31 is: 472.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.55 : 732.59 = 315.31 : x
  2. Step 2: Convert to fraction form
    488.55/732.59 = 315.31/x
  3. Step 3: Cross multiply
    488.55x = 732.59 × 315.31
  4. Step 4: Simplify right side
    488.55x = 230,992.95
  5. Step 5: Solve for x
    x = 230,992.95/488.55
  6. Step 6: Final answer
    x = 472.81

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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.