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Finding the Fourth Proportional to 679.46, 937.62 and 380.69

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Solution

The fourth proportional to 679.46, 937.62 and 380.69 is: 525.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.46 : 937.62 = 380.69 : x
  2. Step 2: Convert to fraction form
    679.46/937.62 = 380.69/x
  3. Step 3: Cross multiply
    679.46x = 937.62 × 380.69
  4. Step 4: Simplify right side
    679.46x = 356,944.90
  5. Step 5: Solve for x
    x = 356,944.90/679.46
  6. Step 6: Final answer
    x = 525.34

Related Problems

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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.