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Finding the Fourth Proportional to 917.23, 1,377.22 and 885.33

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Solution

The fourth proportional to 917.23, 1,377.22 and 885.33 is: 1,329.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.23 : 1,377.22 = 885.33 : x
  2. Step 2: Convert to fraction form
    917.23/1,377.22 = 885.33/x
  3. Step 3: Cross multiply
    917.23x = 1,377.22 × 885.33
  4. Step 4: Simplify right side
    917.23x = 1,219,294.18
  5. Step 5: Solve for x
    x = 1,219,294.18/917.23
  6. Step 6: Final answer
    x = 1,329.32

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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.