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Finding the Fourth Proportional to 313.48, 432.27 and 189.11

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Solution

The fourth proportional to 313.48, 432.27 and 189.11 is: 260.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.48 : 432.27 = 189.11 : x
  2. Step 2: Convert to fraction form
    313.48/432.27 = 189.11/x
  3. Step 3: Cross multiply
    313.48x = 432.27 × 189.11
  4. Step 4: Simplify right side
    313.48x = 81,746.58
  5. Step 5: Solve for x
    x = 81,746.58/313.48
  6. Step 6: Final answer
    x = 260.78

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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.