Home / 2,987.08-4,122.19-1,807.31

Finding the Fourth Proportional to 2,987.08, 4,122.19 and 1,807.31

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Solution

The fourth proportional to 2,987.08, 4,122.19 and 1,807.31 is: 2,494.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.08 : 4,122.19 = 1,807.31 : x
  2. Step 2: Convert to fraction form
    2,987.08/4,122.19 = 1,807.31/x
  3. Step 3: Cross multiply
    2,987.08x = 4,122.19 × 1,807.31
  4. Step 4: Simplify right side
    2,987.08x = 7,450,087.77
  5. Step 5: Solve for x
    x = 7,450,087.77/2,987.08
  6. Step 6: Final answer
    x = 2,494.11

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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.