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Finding the Fourth Proportional to 668.50, 921.60 and 576.23

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Solution

The fourth proportional to 668.50, 921.60 and 576.23 is: 794.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.50 : 921.60 = 576.23 : x
  2. Step 2: Convert to fraction form
    668.50/921.60 = 576.23/x
  3. Step 3: Cross multiply
    668.50x = 921.60 × 576.23
  4. Step 4: Simplify right side
    668.50x = 531,048.96
  5. Step 5: Solve for x
    x = 531,048.96/668.50
  6. Step 6: Final answer
    x = 794.39

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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.