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Finding the Fourth Proportional to 666.92, 920.22 and 573.56

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Solution

The fourth proportional to 666.92, 920.22 and 573.56 is: 791.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.92 : 920.22 = 573.56 : x
  2. Step 2: Convert to fraction form
    666.92/920.22 = 573.56/x
  3. Step 3: Cross multiply
    666.92x = 920.22 × 573.56
  4. Step 4: Simplify right side
    666.92x = 527,801.38
  5. Step 5: Solve for x
    x = 527,801.38/666.92
  6. Step 6: Final answer
    x = 791.40

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Double scale
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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.