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Finding the Fourth Proportional to 556.09, 834.18 and 145.23

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Solution

The fourth proportional to 556.09, 834.18 and 145.23 is: 217.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.09 : 834.18 = 145.23 : x
  2. Step 2: Convert to fraction form
    556.09/834.18 = 145.23/x
  3. Step 3: Cross multiply
    556.09x = 834.18 × 145.23
  4. Step 4: Simplify right side
    556.09x = 121,148.51
  5. Step 5: Solve for x
    x = 121,148.51/556.09
  6. Step 6: Final answer
    x = 217.86

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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.