Home / 2,890.25-3,988.55-1,563.96

Finding the Fourth Proportional to 2,890.25, 3,988.55 and 1,563.96

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Solution

The fourth proportional to 2,890.25, 3,988.55 and 1,563.96 is: 2,158.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.25 : 3,988.55 = 1,563.96 : x
  2. Step 2: Convert to fraction form
    2,890.25/3,988.55 = 1,563.96/x
  3. Step 3: Cross multiply
    2,890.25x = 3,988.55 × 1,563.96
  4. Step 4: Simplify right side
    2,890.25x = 6,237,924.84
  5. Step 5: Solve for x
    x = 6,237,924.84/2,890.25
  6. Step 6: Final answer
    x = 2,158.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.