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Finding the Fourth Proportional to 556.29, 834.47 and 145.43

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Solution

The fourth proportional to 556.29, 834.47 and 145.43 is: 218.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.29 : 834.47 = 145.43 : x
  2. Step 2: Convert to fraction form
    556.29/834.47 = 145.43/x
  3. Step 3: Cross multiply
    556.29x = 834.47 × 145.43
  4. Step 4: Simplify right side
    556.29x = 121,354.16
  5. Step 5: Solve for x
    x = 121,354.16/556.29
  6. Step 6: Final answer
    x = 218.15

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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.