Home / 2,420.56-3,624.36-1,989.64

Finding the Fourth Proportional to 2,420.56, 3,624.36 and 1,989.64

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Solution

The fourth proportional to 2,420.56, 3,624.36 and 1,989.64 is: 2,979.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.56 : 3,624.36 = 1,989.64 : x
  2. Step 2: Convert to fraction form
    2,420.56/3,624.36 = 1,989.64/x
  3. Step 3: Cross multiply
    2,420.56x = 3,624.36 × 1,989.64
  4. Step 4: Simplify right side
    2,420.56x = 7,211,171.63
  5. Step 5: Solve for x
    x = 7,211,171.63/2,420.56
  6. Step 6: Final answer
    x = 2,979.13

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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.