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Finding the Fourth Proportional to 679.42, 937.51 and 380.63

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Solution

The fourth proportional to 679.42, 937.51 and 380.63 is: 525.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.42 : 937.51 = 380.63 : x
  2. Step 2: Convert to fraction form
    679.42/937.51 = 380.63/x
  3. Step 3: Cross multiply
    679.42x = 937.51 × 380.63
  4. Step 4: Simplify right side
    679.42x = 356,845.82
  5. Step 5: Solve for x
    x = 356,845.82/679.42
  6. Step 6: Final answer
    x = 525.22

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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.