Home / 2,921.40-4,029.40-1,800.88

Finding the Fourth Proportional to 2,921.40, 4,029.40 and 1,800.88

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Solution

The fourth proportional to 2,921.40, 4,029.40 and 1,800.88 is: 2,483.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.40 : 4,029.40 = 1,800.88 : x
  2. Step 2: Convert to fraction form
    2,921.40/4,029.40 = 1,800.88/x
  3. Step 3: Cross multiply
    2,921.40x = 4,029.40 × 1,800.88
  4. Step 4: Simplify right side
    2,921.40x = 7,256,465.87
  5. Step 5: Solve for x
    x = 7,256,465.87/2,921.40
  6. Step 6: Final answer
    x = 2,483.90

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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.