Home / 1,921.12-2,878.30-1,370.46

Finding the Fourth Proportional to 1,921.12, 2,878.30 and 1,370.46

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Solution

The fourth proportional to 1,921.12, 2,878.30 and 1,370.46 is: 2,053.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.12 : 2,878.30 = 1,370.46 : x
  2. Step 2: Convert to fraction form
    1,921.12/2,878.30 = 1,370.46/x
  3. Step 3: Cross multiply
    1,921.12x = 2,878.30 × 1,370.46
  4. Step 4: Simplify right side
    1,921.12x = 3,944,595.02
  5. Step 5: Solve for x
    x = 3,944,595.02/1,921.12
  6. Step 6: Final answer
    x = 2,053.28

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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.