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Finding the Fourth Proportional to 876.21, 1,208.28 and 527.10

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Solution

The fourth proportional to 876.21, 1,208.28 and 527.10 is: 726.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.21 : 1,208.28 = 527.10 : x
  2. Step 2: Convert to fraction form
    876.21/1,208.28 = 527.10/x
  3. Step 3: Cross multiply
    876.21x = 1,208.28 × 527.10
  4. Step 4: Simplify right side
    876.21x = 636,884.39
  5. Step 5: Solve for x
    x = 636,884.39/876.21
  6. Step 6: Final answer
    x = 726.86

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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.