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Finding the Fourth Proportional to 618, 931.36 and 582.72

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Solution

The fourth proportional to 618, 931.36 and 582.72 is: 878.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    618 : 931.36 = 582.72 : x
  2. Step 2: Convert to fraction form
    618/931.36 = 582.72/x
  3. Step 3: Cross multiply
    618x = 931.36 × 582.72
  4. Step 4: Simplify right side
    618x = 542,722.10
  5. Step 5: Solve for x
    x = 542,722.10/618
  6. Step 6: Final answer
    x = 878.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.