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Finding the Fourth Proportional to 967.78, 1,335.51 and 548.07

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Solution

The fourth proportional to 967.78, 1,335.51 and 548.07 is: 756.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.78 : 1,335.51 = 548.07 : x
  2. Step 2: Convert to fraction form
    967.78/1,335.51 = 548.07/x
  3. Step 3: Cross multiply
    967.78x = 1,335.51 × 548.07
  4. Step 4: Simplify right side
    967.78x = 731,952.97
  5. Step 5: Solve for x
    x = 731,952.97/967.78
  6. Step 6: Final answer
    x = 756.32

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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.