Home / 2,987.19-4,122.50-1,808.37

Finding the Fourth Proportional to 2,987.19, 4,122.50 and 1,808.37

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Solution

The fourth proportional to 2,987.19, 4,122.50 and 1,808.37 is: 2,495.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.19 : 4,122.50 = 1,808.37 : x
  2. Step 2: Convert to fraction form
    2,987.19/4,122.50 = 1,808.37/x
  3. Step 3: Cross multiply
    2,987.19x = 4,122.50 × 1,808.37
  4. Step 4: Simplify right side
    2,987.19x = 7,454,996.28
  5. Step 5: Solve for x
    x = 7,454,996.28/2,987.19
  6. Step 6: Final answer
    x = 2,495.66

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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.