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Finding the Fourth Proportional to 618.85, 929.18 and 376.39

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Solution

The fourth proportional to 618.85, 929.18 and 376.39 is: 565.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.85 : 929.18 = 376.39 : x
  2. Step 2: Convert to fraction form
    618.85/929.18 = 376.39/x
  3. Step 3: Cross multiply
    618.85x = 929.18 × 376.39
  4. Step 4: Simplify right side
    618.85x = 349,734.06
  5. Step 5: Solve for x
    x = 349,734.06/618.85
  6. Step 6: Final answer
    x = 565.14

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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.