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Finding the Fourth Proportional to 634.56, 877.20 and 547.20

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Solution

The fourth proportional to 634.56, 877.20 and 547.20 is: 756.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.56 : 877.20 = 547.20 : x
  2. Step 2: Convert to fraction form
    634.56/877.20 = 547.20/x
  3. Step 3: Cross multiply
    634.56x = 877.20 × 547.20
  4. Step 4: Simplify right side
    634.56x = 480,003.84
  5. Step 5: Solve for x
    x = 480,003.84/634.56
  6. Step 6: Final answer
    x = 756.44

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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.