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Finding the Fourth Proportional to 313.29, 432.80 and 243.52

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Solution

The fourth proportional to 313.29, 432.80 and 243.52 is: 336.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.29 : 432.80 = 243.52 : x
  2. Step 2: Convert to fraction form
    313.29/432.80 = 243.52/x
  3. Step 3: Cross multiply
    313.29x = 432.80 × 243.52
  4. Step 4: Simplify right side
    313.29x = 105,395.46
  5. Step 5: Solve for x
    x = 105,395.46/313.29
  6. Step 6: Final answer
    x = 336.42

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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.