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Finding the Fourth Proportional to 210.04, 314.82 and 79.92

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Solution

The fourth proportional to 210.04, 314.82 and 79.92 is: 119.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.04 : 314.82 = 79.92 : x
  2. Step 2: Convert to fraction form
    210.04/314.82 = 79.92/x
  3. Step 3: Cross multiply
    210.04x = 314.82 × 79.92
  4. Step 4: Simplify right side
    210.04x = 25,160.41
  5. Step 5: Solve for x
    x = 25,160.41/210.04
  6. Step 6: Final answer
    x = 119.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.