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Finding the Fourth Proportional to 863.07, 1,191.15 and 548.39

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Solution

The fourth proportional to 863.07, 1,191.15 and 548.39 is: 756.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.07 : 1,191.15 = 548.39 : x
  2. Step 2: Convert to fraction form
    863.07/1,191.15 = 548.39/x
  3. Step 3: Cross multiply
    863.07x = 1,191.15 × 548.39
  4. Step 4: Simplify right side
    863.07x = 653,208.79
  5. Step 5: Solve for x
    x = 653,208.79/863.07
  6. Step 6: Final answer
    x = 756.84

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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.