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Finding the Fourth Proportional to 312.68, 469.13 and 150.39

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Solution

The fourth proportional to 312.68, 469.13 and 150.39 is: 225.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.68 : 469.13 = 150.39 : x
  2. Step 2: Convert to fraction form
    312.68/469.13 = 150.39/x
  3. Step 3: Cross multiply
    312.68x = 469.13 × 150.39
  4. Step 4: Simplify right side
    312.68x = 70,551.71
  5. Step 5: Solve for x
    x = 70,551.71/312.68
  6. Step 6: Final answer
    x = 225.63

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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.