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Finding the Fourth Proportional to 667.50, 921.42 and 434.76

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Solution

The fourth proportional to 667.50, 921.42 and 434.76 is: 600.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.50 : 921.42 = 434.76 : x
  2. Step 2: Convert to fraction form
    667.50/921.42 = 434.76/x
  3. Step 3: Cross multiply
    667.50x = 921.42 × 434.76
  4. Step 4: Simplify right side
    667.50x = 400,596.56
  5. Step 5: Solve for x
    x = 400,596.56/667.50
  6. Step 6: Final answer
    x = 600.14

Related Problems

Find fourth proportional to 333.75, 460.71 and 217.38
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Double scale
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Similar ratio
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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.