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Finding the Fourth Proportional to 313.18, 469.78 and 96.75

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Solution

The fourth proportional to 313.18, 469.78 and 96.75 is: 145.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.18 : 469.78 = 96.75 : x
  2. Step 2: Convert to fraction form
    313.18/469.78 = 96.75/x
  3. Step 3: Cross multiply
    313.18x = 469.78 × 96.75
  4. Step 4: Simplify right side
    313.18x = 45,450.97
  5. Step 5: Solve for x
    x = 45,450.97/313.18
  6. Step 6: Final answer
    x = 145.13

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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.