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Finding the Fourth Proportional to 679.54, 937.26 and 455.38

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Solution

The fourth proportional to 679.54, 937.26 and 455.38 is: 628.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.54 : 937.26 = 455.38 : x
  2. Step 2: Convert to fraction form
    679.54/937.26 = 455.38/x
  3. Step 3: Cross multiply
    679.54x = 937.26 × 455.38
  4. Step 4: Simplify right side
    679.54x = 426,809.46
  5. Step 5: Solve for x
    x = 426,809.46/679.54
  6. Step 6: Final answer
    x = 628.09

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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.