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Finding the Fourth Proportional to 2,169.20, 3,252.84 and 870.32

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Solution

The fourth proportional to 2,169.20, 3,252.84 and 870.32 is: 1,305.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.20 : 3,252.84 = 870.32 : x
  2. Step 2: Convert to fraction form
    2,169.20/3,252.84 = 870.32/x
  3. Step 3: Cross multiply
    2,169.20x = 3,252.84 × 870.32
  4. Step 4: Simplify right side
    2,169.20x = 2,831,011.71
  5. Step 5: Solve for x
    x = 2,831,011.71/2,169.20
  6. Step 6: Final answer
    x = 1,305.09

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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.