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Finding the Fourth Proportional to 673.38, 929.21 and 378.61

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Solution

The fourth proportional to 673.38, 929.21 and 378.61 is: 522.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.38 : 929.21 = 378.61 : x
  2. Step 2: Convert to fraction form
    673.38/929.21 = 378.61/x
  3. Step 3: Cross multiply
    673.38x = 929.21 × 378.61
  4. Step 4: Simplify right side
    673.38x = 351,803.98
  5. Step 5: Solve for x
    x = 351,803.98/673.38
  6. Step 6: Final answer
    x = 522.44

Related Problems

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Half scale
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Double scale
Find fourth proportional to 674.38, 930.58 and 379.61
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.