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Finding the Fourth Proportional to 313.60, 432.76 and 197.14

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Solution

The fourth proportional to 313.60, 432.76 and 197.14 is: 272.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.60 : 432.76 = 197.14 : x
  2. Step 2: Convert to fraction form
    313.60/432.76 = 197.14/x
  3. Step 3: Cross multiply
    313.60x = 432.76 × 197.14
  4. Step 4: Simplify right side
    313.60x = 85,314.31
  5. Step 5: Solve for x
    x = 85,314.31/313.60
  6. Step 6: Final answer
    x = 272.05

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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.