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Finding the Fourth Proportional to 313.10, 432.07 and 187.12

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Solution

The fourth proportional to 313.10, 432.07 and 187.12 is: 258.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.10 : 432.07 = 187.12 : x
  2. Step 2: Convert to fraction form
    313.10/432.07 = 187.12/x
  3. Step 3: Cross multiply
    313.10x = 432.07 × 187.12
  4. Step 4: Simplify right side
    313.10x = 80,846.95
  5. Step 5: Solve for x
    x = 80,846.95/313.10
  6. Step 6: Final answer
    x = 258.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.