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Finding the Fourth Proportional to 313.15, 469.62 and 148.60

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Solution

The fourth proportional to 313.15, 469.62 and 148.60 is: 222.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.15 : 469.62 = 148.60 : x
  2. Step 2: Convert to fraction form
    313.15/469.62 = 148.60/x
  3. Step 3: Cross multiply
    313.15x = 469.62 × 148.60
  4. Step 4: Simplify right side
    313.15x = 69,785.53
  5. Step 5: Solve for x
    x = 69,785.53/313.15
  6. Step 6: Final answer
    x = 222.85

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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.