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Finding the Fourth Proportional to 667.49, 921.15 and 372.77

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Solution

The fourth proportional to 667.49, 921.15 and 372.77 is: 514.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.49 : 921.15 = 372.77 : x
  2. Step 2: Convert to fraction form
    667.49/921.15 = 372.77/x
  3. Step 3: Cross multiply
    667.49x = 921.15 × 372.77
  4. Step 4: Simplify right side
    667.49x = 343,370.62
  5. Step 5: Solve for x
    x = 343,370.62/667.49
  6. Step 6: Final answer
    x = 514.42

Related Problems

Find fourth proportional to 333.75, 460.57 and 186.38
Half scale
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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.