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Finding the Fourth Proportional to 928.06, 1,389.21 and 733.66

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Solution

The fourth proportional to 928.06, 1,389.21 and 733.66 is: 1,098.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.06 : 1,389.21 = 733.66 : x
  2. Step 2: Convert to fraction form
    928.06/1,389.21 = 733.66/x
  3. Step 3: Cross multiply
    928.06x = 1,389.21 × 733.66
  4. Step 4: Simplify right side
    928.06x = 1,019,207.81
  5. Step 5: Solve for x
    x = 1,019,207.81/928.06
  6. Step 6: Final answer
    x = 1,098.21

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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.