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Finding the Fourth Proportional to 834.61, 1,151.84 and 485.41

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Solution

The fourth proportional to 834.61, 1,151.84 and 485.41 is: 669.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.61 : 1,151.84 = 485.41 : x
  2. Step 2: Convert to fraction form
    834.61/1,151.84 = 485.41/x
  3. Step 3: Cross multiply
    834.61x = 1,151.84 × 485.41
  4. Step 4: Simplify right side
    834.61x = 559,114.65
  5. Step 5: Solve for x
    x = 559,114.65/834.61
  6. Step 6: Final answer
    x = 669.91

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Double scale
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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.