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Finding the Fourth Proportional to 313.59, 432.69 and 189.23

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Solution

The fourth proportional to 313.59, 432.69 and 189.23 is: 261.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.59 : 432.69 = 189.23 : x
  2. Step 2: Convert to fraction form
    313.59/432.69 = 189.23/x
  3. Step 3: Cross multiply
    313.59x = 432.69 × 189.23
  4. Step 4: Simplify right side
    313.59x = 81,875.77
  5. Step 5: Solve for x
    x = 81,875.77/313.59
  6. Step 6: Final answer
    x = 261.09

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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.