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Finding the Fourth Proportional to 313.70, 432.88 and 230.66

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Solution

The fourth proportional to 313.70, 432.88 and 230.66 is: 318.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.70 : 432.88 = 230.66 : x
  2. Step 2: Convert to fraction form
    313.70/432.88 = 230.66/x
  3. Step 3: Cross multiply
    313.70x = 432.88 × 230.66
  4. Step 4: Simplify right side
    313.70x = 99,848.50
  5. Step 5: Solve for x
    x = 99,848.50/313.70
  6. Step 6: Final answer
    x = 318.29

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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.