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Finding the Fourth Proportional to 486.61, 726.49 and 370.42

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Solution

The fourth proportional to 486.61, 726.49 and 370.42 is: 553.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.61 : 726.49 = 370.42 : x
  2. Step 2: Convert to fraction form
    486.61/726.49 = 370.42/x
  3. Step 3: Cross multiply
    486.61x = 726.49 × 370.42
  4. Step 4: Simplify right side
    486.61x = 269,110.20
  5. Step 5: Solve for x
    x = 269,110.20/486.61
  6. Step 6: Final answer
    x = 553.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.