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Finding the Fourth Proportional to 873.88, 1,309.09 and 527.30

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Solution

The fourth proportional to 873.88, 1,309.09 and 527.30 is: 789.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.88 : 1,309.09 = 527.30 : x
  2. Step 2: Convert to fraction form
    873.88/1,309.09 = 527.30/x
  3. Step 3: Cross multiply
    873.88x = 1,309.09 × 527.30
  4. Step 4: Simplify right side
    873.88x = 690,285.11
  5. Step 5: Solve for x
    x = 690,285.11/873.88
  6. Step 6: Final answer
    x = 789.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.