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Finding the Fourth Proportional to 911.32, 1,365.96 and 756.34

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Solution

The fourth proportional to 911.32, 1,365.96 and 756.34 is: 1,133.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.32 : 1,365.96 = 756.34 : x
  2. Step 2: Convert to fraction form
    911.32/1,365.96 = 756.34/x
  3. Step 3: Cross multiply
    911.32x = 1,365.96 × 756.34
  4. Step 4: Simplify right side
    911.32x = 1,033,130.19
  5. Step 5: Solve for x
    x = 1,033,130.19/911.32
  6. Step 6: Final answer
    x = 1,133.66

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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.