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Finding the Fourth Proportional to 313.19, 432.15 and 173.30

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Solution

The fourth proportional to 313.19, 432.15 and 173.30 is: 239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.19 : 432.15 = 173.30 : x
  2. Step 2: Convert to fraction form
    313.19/432.15 = 173.30/x
  3. Step 3: Cross multiply
    313.19x = 432.15 × 173.30
  4. Step 4: Simplify right side
    313.19x = 74,889.43
  5. Step 5: Solve for x
    x = 74,889.43/313.19
  6. Step 6: Final answer
    x = 239.12

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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.