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Finding the Fourth Proportional to 618.62, 925.78 and 435.14

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Solution

The fourth proportional to 618.62, 925.78 and 435.14 is: 651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.62 : 925.78 = 435.14 : x
  2. Step 2: Convert to fraction form
    618.62/925.78 = 435.14/x
  3. Step 3: Cross multiply
    618.62x = 925.78 × 435.14
  4. Step 4: Simplify right side
    618.62x = 402,843.91
  5. Step 5: Solve for x
    x = 402,843.91/618.62
  6. Step 6: Final answer
    x = 651.20

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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.