Home / 4,378.90-6,563.31-2,189.20

Finding the Fourth Proportional to 4,378.90, 6,563.31 and 2,189.20

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Solution

The fourth proportional to 4,378.90, 6,563.31 and 2,189.20 is: 3,281.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,378.90 : 6,563.31 = 2,189.20 : x
  2. Step 2: Convert to fraction form
    4,378.90/6,563.31 = 2,189.20/x
  3. Step 3: Cross multiply
    4,378.90x = 6,563.31 × 2,189.20
  4. Step 4: Simplify right side
    4,378.90x = 14,368,398.25
  5. Step 5: Solve for x
    x = 14,368,398.25/4,378.90
  6. Step 6: Final answer
    x = 3,281.28

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Half scale
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Double scale
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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.