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Finding the Fourth Proportional to 856.73, 1,183.44 and 662.69

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Solution

The fourth proportional to 856.73, 1,183.44 and 662.69 is: 915.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.73 : 1,183.44 = 662.69 : x
  2. Step 2: Convert to fraction form
    856.73/1,183.44 = 662.69/x
  3. Step 3: Cross multiply
    856.73x = 1,183.44 × 662.69
  4. Step 4: Simplify right side
    856.73x = 784,253.85
  5. Step 5: Solve for x
    x = 784,253.85/856.73
  6. Step 6: Final answer
    x = 915.40

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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.