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Finding the Fourth Proportional to 313.12, 469.22 and 156.86

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Solution

The fourth proportional to 313.12, 469.22 and 156.86 is: 235.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.12 : 469.22 = 156.86 : x
  2. Step 2: Convert to fraction form
    313.12/469.22 = 156.86/x
  3. Step 3: Cross multiply
    313.12x = 469.22 × 156.86
  4. Step 4: Simplify right side
    313.12x = 73,601.85
  5. Step 5: Solve for x
    x = 73,601.85/313.12
  6. Step 6: Final answer
    x = 235.06

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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.