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Finding the Fourth Proportional to 909.94, 1,364.16 and 755.44

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Solution

The fourth proportional to 909.94, 1,364.16 and 755.44 is: 1,132.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.94 : 1,364.16 = 755.44 : x
  2. Step 2: Convert to fraction form
    909.94/1,364.16 = 755.44/x
  3. Step 3: Cross multiply
    909.94x = 1,364.16 × 755.44
  4. Step 4: Simplify right side
    909.94x = 1,030,541.03
  5. Step 5: Solve for x
    x = 1,030,541.03/909.94
  6. Step 6: Final answer
    x = 1,132.54

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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.