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Finding the Fourth Proportional to 187.18, 257.94 and 152.10

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Solution

The fourth proportional to 187.18, 257.94 and 152.10 is: 209.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.18 : 257.94 = 152.10 : x
  2. Step 2: Convert to fraction form
    187.18/257.94 = 152.10/x
  3. Step 3: Cross multiply
    187.18x = 257.94 × 152.10
  4. Step 4: Simplify right side
    187.18x = 39,231.71
  5. Step 5: Solve for x
    x = 39,231.71/187.18
  6. Step 6: Final answer
    x = 209.59

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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.