Home / 2,921.60-4,382.46-1,688.12

Finding the Fourth Proportional to 2,921.60, 4,382.46 and 1,688.12

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Solution

The fourth proportional to 2,921.60, 4,382.46 and 1,688.12 is: 2,532.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.60 : 4,382.46 = 1,688.12 : x
  2. Step 2: Convert to fraction form
    2,921.60/4,382.46 = 1,688.12/x
  3. Step 3: Cross multiply
    2,921.60x = 4,382.46 × 1,688.12
  4. Step 4: Simplify right side
    2,921.60x = 7,398,118.38
  5. Step 5: Solve for x
    x = 7,398,118.38/2,921.60
  6. Step 6: Final answer
    x = 2,532.21

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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.