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Finding the Fourth Proportional to 834.37, 1,151.35 and 485.13

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Solution

The fourth proportional to 834.37, 1,151.35 and 485.13 is: 669.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.37 : 1,151.35 = 485.13 : x
  2. Step 2: Convert to fraction form
    834.37/1,151.35 = 485.13/x
  3. Step 3: Cross multiply
    834.37x = 1,151.35 × 485.13
  4. Step 4: Simplify right side
    834.37x = 558,554.43
  5. Step 5: Solve for x
    x = 558,554.43/834.37
  6. Step 6: Final answer
    x = 669.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.