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Finding the Fourth Proportional to 869.22, 1,302.09 and 560.00

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Solution

The fourth proportional to 869.22, 1,302.09 and 560.00 is: 838.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.22 : 1,302.09 = 560.00 : x
  2. Step 2: Convert to fraction form
    869.22/1,302.09 = 560.00/x
  3. Step 3: Cross multiply
    869.22x = 1,302.09 × 560.00
  4. Step 4: Simplify right side
    869.22x = 729,163.89
  5. Step 5: Solve for x
    x = 729,163.89/869.22
  6. Step 6: Final answer
    x = 838.87

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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.