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Finding the Fourth Proportional to 313.15, 432.18 and 173.29

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Solution

The fourth proportional to 313.15, 432.18 and 173.29 is: 239.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.15 : 432.18 = 173.29 : x
  2. Step 2: Convert to fraction form
    313.15/432.18 = 173.29/x
  3. Step 3: Cross multiply
    313.15x = 432.18 × 173.29
  4. Step 4: Simplify right side
    313.15x = 74,892.47
  5. Step 5: Solve for x
    x = 74,892.47/313.15
  6. Step 6: Final answer
    x = 239.16

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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.