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Finding the Fourth Proportional to 2,226.86, 3,340.33 and 840.32

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Solution

The fourth proportional to 2,226.86, 3,340.33 and 840.32 is: 1,260.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,226.86 : 3,340.33 = 840.32 : x
  2. Step 2: Convert to fraction form
    2,226.86/3,340.33 = 840.32/x
  3. Step 3: Cross multiply
    2,226.86x = 3,340.33 × 840.32
  4. Step 4: Simplify right side
    2,226.86x = 2,806,946.11
  5. Step 5: Solve for x
    x = 2,806,946.11/2,226.86
  6. Step 6: Final answer
    x = 1,260.50

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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.