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Finding the Fourth Proportional to 612.36, 844.43 and 538.65

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Solution

The fourth proportional to 612.36, 844.43 and 538.65 is: 742.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.36 : 844.43 = 538.65 : x
  2. Step 2: Convert to fraction form
    612.36/844.43 = 538.65/x
  3. Step 3: Cross multiply
    612.36x = 844.43 × 538.65
  4. Step 4: Simplify right side
    612.36x = 454,849.53
  5. Step 5: Solve for x
    x = 454,849.53/612.36
  6. Step 6: Final answer
    x = 742.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.