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Finding the Fourth Proportional to 943.96, 1,291.12 and 928.84

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Solution

The fourth proportional to 943.96, 1,291.12 and 928.84 is: 1,270.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.96 : 1,291.12 = 928.84 : x
  2. Step 2: Convert to fraction form
    943.96/1,291.12 = 928.84/x
  3. Step 3: Cross multiply
    943.96x = 1,291.12 × 928.84
  4. Step 4: Simplify right side
    943.96x = 1,199,243.90
  5. Step 5: Solve for x
    x = 1,199,243.90/943.96
  6. Step 6: Final answer
    x = 1,270.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.