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Finding the Fourth Proportional to 661.08, 912.39 and 550.38

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Solution

The fourth proportional to 661.08, 912.39 and 550.38 is: 759.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.08 : 912.39 = 550.38 : x
  2. Step 2: Convert to fraction form
    661.08/912.39 = 550.38/x
  3. Step 3: Cross multiply
    661.08x = 912.39 × 550.38
  4. Step 4: Simplify right side
    661.08x = 502,161.21
  5. Step 5: Solve for x
    x = 502,161.21/661.08
  6. Step 6: Final answer
    x = 759.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.