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Finding the Fourth Proportional to 618.28, 926.49 and 572.72

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Solution

The fourth proportional to 618.28, 926.49 and 572.72 is: 858.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.28 : 926.49 = 572.72 : x
  2. Step 2: Convert to fraction form
    618.28/926.49 = 572.72/x
  3. Step 3: Cross multiply
    618.28x = 926.49 × 572.72
  4. Step 4: Simplify right side
    618.28x = 530,614.72
  5. Step 5: Solve for x
    x = 530,614.72/618.28
  6. Step 6: Final answer
    x = 858.21

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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.