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Finding the Fourth Proportional to 209.84, 314.72 and 88.08

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Solution

The fourth proportional to 209.84, 314.72 and 88.08 is: 132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.84 : 314.72 = 88.08 : x
  2. Step 2: Convert to fraction form
    209.84/314.72 = 88.08/x
  3. Step 3: Cross multiply
    209.84x = 314.72 × 88.08
  4. Step 4: Simplify right side
    209.84x = 27,720.54
  5. Step 5: Solve for x
    x = 27,720.54/209.84
  6. Step 6: Final answer
    x = 132.10

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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.