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Finding the Fourth Proportional to 885.25, 1,318.53 and 838.99

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Solution

The fourth proportional to 885.25, 1,318.53 and 838.99 is: 1,249.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.25 : 1,318.53 = 838.99 : x
  2. Step 2: Convert to fraction form
    885.25/1,318.53 = 838.99/x
  3. Step 3: Cross multiply
    885.25x = 1,318.53 × 838.99
  4. Step 4: Simplify right side
    885.25x = 1,106,229.29
  5. Step 5: Solve for x
    x = 1,106,229.29/885.25
  6. Step 6: Final answer
    x = 1,249.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.