Home / 2,987.96-4,122.32-1,870.29

Finding the Fourth Proportional to 2,987.96, 4,122.32 and 1,870.29

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Solution

The fourth proportional to 2,987.96, 4,122.32 and 1,870.29 is: 2,580.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.96 : 4,122.32 = 1,870.29 : x
  2. Step 2: Convert to fraction form
    2,987.96/4,122.32 = 1,870.29/x
  3. Step 3: Cross multiply
    2,987.96x = 4,122.32 × 1,870.29
  4. Step 4: Simplify right side
    2,987.96x = 7,709,924.52
  5. Step 5: Solve for x
    x = 7,709,924.52/2,987.96
  6. Step 6: Final answer
    x = 2,580.33

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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.