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Finding the Fourth Proportional to 926.35, 1,278.28 and 548.39

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Solution

The fourth proportional to 926.35, 1,278.28 and 548.39 is: 756.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.35 : 1,278.28 = 548.39 : x
  2. Step 2: Convert to fraction form
    926.35/1,278.28 = 548.39/x
  3. Step 3: Cross multiply
    926.35x = 1,278.28 × 548.39
  4. Step 4: Simplify right side
    926.35x = 700,995.97
  5. Step 5: Solve for x
    x = 700,995.97/926.35
  6. Step 6: Final answer
    x = 756.73

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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.