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Finding the Fourth Proportional to 231.18, 319.10 and 152.56

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Solution

The fourth proportional to 231.18, 319.10 and 152.56 is: 210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.18 : 319.10 = 152.56 : x
  2. Step 2: Convert to fraction form
    231.18/319.10 = 152.56/x
  3. Step 3: Cross multiply
    231.18x = 319.10 × 152.56
  4. Step 4: Simplify right side
    231.18x = 48,681.90
  5. Step 5: Solve for x
    x = 48,681.90/231.18
  6. Step 6: Final answer
    x = 210.58

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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.