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Finding the Fourth Proportional to 667.80, 921.66 and 434.52

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Solution

The fourth proportional to 667.80, 921.66 and 434.52 is: 599.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.80 : 921.66 = 434.52 : x
  2. Step 2: Convert to fraction form
    667.80/921.66 = 434.52/x
  3. Step 3: Cross multiply
    667.80x = 921.66 × 434.52
  4. Step 4: Simplify right side
    667.80x = 400,479.70
  5. Step 5: Solve for x
    x = 400,479.70/667.80
  6. Step 6: Final answer
    x = 599.70

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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.