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Finding the Fourth Proportional to 869.56, 1,304.92 and 577.40

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Solution

The fourth proportional to 869.56, 1,304.92 and 577.40 is: 866.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.56 : 1,304.92 = 577.40 : x
  2. Step 2: Convert to fraction form
    869.56/1,304.92 = 577.40/x
  3. Step 3: Cross multiply
    869.56x = 1,304.92 × 577.40
  4. Step 4: Simplify right side
    869.56x = 753,455.01
  5. Step 5: Solve for x
    x = 753,455.01/869.56
  6. Step 6: Final answer
    x = 866.48

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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.