Home / 1,869.12-2,579.36-1,029.80

Finding the Fourth Proportional to 1,869.12, 2,579.36 and 1,029.80

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Solution

The fourth proportional to 1,869.12, 2,579.36 and 1,029.80 is: 1,421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.12 : 2,579.36 = 1,029.80 : x
  2. Step 2: Convert to fraction form
    1,869.12/2,579.36 = 1,029.80/x
  3. Step 3: Cross multiply
    1,869.12x = 2,579.36 × 1,029.80
  4. Step 4: Simplify right side
    1,869.12x = 2,656,206.88
  5. Step 5: Solve for x
    x = 2,656,206.88/1,869.12
  6. Step 6: Final answer
    x = 1,421.10

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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.