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Finding the Fourth Proportional to 834.71, 1,151.96 and 485.42

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Solution

The fourth proportional to 834.71, 1,151.96 and 485.42 is: 669.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.71 : 1,151.96 = 485.42 : x
  2. Step 2: Convert to fraction form
    834.71/1,151.96 = 485.42/x
  3. Step 3: Cross multiply
    834.71x = 1,151.96 × 485.42
  4. Step 4: Simplify right side
    834.71x = 559,176.24
  5. Step 5: Solve for x
    x = 559,176.24/834.71
  6. Step 6: Final answer
    x = 669.91

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Double scale
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1.5x scale

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.