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Finding the Fourth Proportional to 934.29, 1,289.22 and 561.27

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Solution

The fourth proportional to 934.29, 1,289.22 and 561.27 is: 774.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.29 : 1,289.22 = 561.27 : x
  2. Step 2: Convert to fraction form
    934.29/1,289.22 = 561.27/x
  3. Step 3: Cross multiply
    934.29x = 1,289.22 × 561.27
  4. Step 4: Simplify right side
    934.29x = 723,600.51
  5. Step 5: Solve for x
    x = 723,600.51/934.29
  6. Step 6: Final answer
    x = 774.49

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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.