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Finding the Fourth Proportional to 556.12, 834.40 and 171.40

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Solution

The fourth proportional to 556.12, 834.40 and 171.40 is: 257.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.12 : 834.40 = 171.40 : x
  2. Step 2: Convert to fraction form
    556.12/834.40 = 171.40/x
  3. Step 3: Cross multiply
    556.12x = 834.40 × 171.40
  4. Step 4: Simplify right side
    556.12x = 143,016.16
  5. Step 5: Solve for x
    x = 143,016.16/556.12
  6. Step 6: Final answer
    x = 257.17

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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.