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Finding the Fourth Proportional to 960.17, 1,439.40 and 569.21

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Solution

The fourth proportional to 960.17, 1,439.40 and 569.21 is: 853.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.17 : 1,439.40 = 569.21 : x
  2. Step 2: Convert to fraction form
    960.17/1,439.40 = 569.21/x
  3. Step 3: Cross multiply
    960.17x = 1,439.40 × 569.21
  4. Step 4: Simplify right side
    960.17x = 819,320.87
  5. Step 5: Solve for x
    x = 819,320.87/960.17
  6. Step 6: Final answer
    x = 853.31

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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.