Home / 2,160.83-3,239.52-1,987.85

Finding the Fourth Proportional to 2,160.83, 3,239.52 and 1,987.85

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Solution

The fourth proportional to 2,160.83, 3,239.52 and 1,987.85 is: 2,980.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.83 : 3,239.52 = 1,987.85 : x
  2. Step 2: Convert to fraction form
    2,160.83/3,239.52 = 1,987.85/x
  3. Step 3: Cross multiply
    2,160.83x = 3,239.52 × 1,987.85
  4. Step 4: Simplify right side
    2,160.83x = 6,439,663.63
  5. Step 5: Solve for x
    x = 6,439,663.63/2,160.83
  6. Step 6: Final answer
    x = 2,980.19

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1.5x scale

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.