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Finding the Fourth Proportional to 923.22, 1,377.72 and 761.22

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Solution

The fourth proportional to 923.22, 1,377.72 and 761.22 is: 1,135.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.22 : 1,377.72 = 761.22 : x
  2. Step 2: Convert to fraction form
    923.22/1,377.72 = 761.22/x
  3. Step 3: Cross multiply
    923.22x = 1,377.72 × 761.22
  4. Step 4: Simplify right side
    923.22x = 1,048,748.02
  5. Step 5: Solve for x
    x = 1,048,748.02/923.22
  6. Step 6: Final answer
    x = 1,135.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.