Home / 1,868.88-2,579.36-1,207.68

Finding the Fourth Proportional to 1,868.88, 2,579.36 and 1,207.68

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Solution

The fourth proportional to 1,868.88, 2,579.36 and 1,207.68 is: 1,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.88 : 2,579.36 = 1,207.68 : x
  2. Step 2: Convert to fraction form
    1,868.88/2,579.36 = 1,207.68/x
  3. Step 3: Cross multiply
    1,868.88x = 2,579.36 × 1,207.68
  4. Step 4: Simplify right side
    1,868.88x = 3,115,041.48
  5. Step 5: Solve for x
    x = 3,115,041.48/1,868.88
  6. Step 6: Final answer
    x = 1,666.80

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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.