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Finding the Fourth Proportional to 312.47, 468.99 and 225.89

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Solution

The fourth proportional to 312.47, 468.99 and 225.89 is: 339.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.47 : 468.99 = 225.89 : x
  2. Step 2: Convert to fraction form
    312.47/468.99 = 225.89/x
  3. Step 3: Cross multiply
    312.47x = 468.99 × 225.89
  4. Step 4: Simplify right side
    312.47x = 105,937.81
  5. Step 5: Solve for x
    x = 105,937.81/312.47
  6. Step 6: Final answer
    x = 339.04

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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.