Home / 2,628.25-3,938.40-1,587.10

Finding the Fourth Proportional to 2,628.25, 3,938.40 and 1,587.10

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Solution

The fourth proportional to 2,628.25, 3,938.40 and 1,587.10 is: 2,378.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.25 : 3,938.40 = 1,587.10 : x
  2. Step 2: Convert to fraction form
    2,628.25/3,938.40 = 1,587.10/x
  3. Step 3: Cross multiply
    2,628.25x = 3,938.40 × 1,587.10
  4. Step 4: Simplify right side
    2,628.25x = 6,250,634.64
  5. Step 5: Solve for x
    x = 6,250,634.64/2,628.25
  6. Step 6: Final answer
    x = 2,378.25

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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.