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Finding the Fourth Proportional to 618.18, 853.28 and 369.57

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Solution

The fourth proportional to 618.18, 853.28 and 369.57 is: 510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.18 : 853.28 = 369.57 : x
  2. Step 2: Convert to fraction form
    618.18/853.28 = 369.57/x
  3. Step 3: Cross multiply
    618.18x = 853.28 × 369.57
  4. Step 4: Simplify right side
    618.18x = 315,346.69
  5. Step 5: Solve for x
    x = 315,346.69/618.18
  6. Step 6: Final answer
    x = 510.12

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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.