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Finding the Fourth Proportional to 210.70, 314.20 and 187.62

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Solution

The fourth proportional to 210.70, 314.20 and 187.62 is: 279.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.70 : 314.20 = 187.62 : x
  2. Step 2: Convert to fraction form
    210.70/314.20 = 187.62/x
  3. Step 3: Cross multiply
    210.70x = 314.20 × 187.62
  4. Step 4: Simplify right side
    210.70x = 58,950.20
  5. Step 5: Solve for x
    x = 58,950.20/210.70
  6. Step 6: Final answer
    x = 279.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.