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Finding the Fourth Proportional to 876.36, 1,208.82 and 540.18

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Solution

The fourth proportional to 876.36, 1,208.82 and 540.18 is: 745.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.36 : 1,208.82 = 540.18 : x
  2. Step 2: Convert to fraction form
    876.36/1,208.82 = 540.18/x
  3. Step 3: Cross multiply
    876.36x = 1,208.82 × 540.18
  4. Step 4: Simplify right side
    876.36x = 652,980.39
  5. Step 5: Solve for x
    x = 652,980.39/876.36
  6. Step 6: Final answer
    x = 745.11

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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.