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Finding the Fourth Proportional to 834.53, 1,151.76 and 485.22

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Solution

The fourth proportional to 834.53, 1,151.76 and 485.22 is: 669.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.53 : 1,151.76 = 485.22 : x
  2. Step 2: Convert to fraction form
    834.53/1,151.76 = 485.22/x
  3. Step 3: Cross multiply
    834.53x = 1,151.76 × 485.22
  4. Step 4: Simplify right side
    834.53x = 558,854.56
  5. Step 5: Solve for x
    x = 558,854.56/834.53
  6. Step 6: Final answer
    x = 669.66

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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.