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Finding the Fourth Proportional to 2,890.92, 4,336.32 and 811.05

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Solution

The fourth proportional to 2,890.92, 4,336.32 and 811.05 is: 1,216.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.92 : 4,336.32 = 811.05 : x
  2. Step 2: Convert to fraction form
    2,890.92/4,336.32 = 811.05/x
  3. Step 3: Cross multiply
    2,890.92x = 4,336.32 × 811.05
  4. Step 4: Simplify right side
    2,890.92x = 3,516,972.34
  5. Step 5: Solve for x
    x = 3,516,972.34/2,890.92
  6. Step 6: Final answer
    x = 1,216.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.