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Finding the Fourth Proportional to 313.15, 469.38 and 148.53

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Solution

The fourth proportional to 313.15, 469.38 and 148.53 is: 222.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.15 : 469.38 = 148.53 : x
  2. Step 2: Convert to fraction form
    313.15/469.38 = 148.53/x
  3. Step 3: Cross multiply
    313.15x = 469.38 × 148.53
  4. Step 4: Simplify right side
    313.15x = 69,717.01
  5. Step 5: Solve for x
    x = 69,717.01/313.15
  6. Step 6: Final answer
    x = 222.63

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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.