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Finding the Fourth Proportional to 618.09, 925.50 and 434.49

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Solution

The fourth proportional to 618.09, 925.50 and 434.49 is: 650.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.09 : 925.50 = 434.49 : x
  2. Step 2: Convert to fraction form
    618.09/925.50 = 434.49/x
  3. Step 3: Cross multiply
    618.09x = 925.50 × 434.49
  4. Step 4: Simplify right side
    618.09x = 402,120.50
  5. Step 5: Solve for x
    x = 402,120.50/618.09
  6. Step 6: Final answer
    x = 650.59

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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.