Home / 2,987.79-4,123.10-1,661.33

Finding the Fourth Proportional to 2,987.79, 4,123.10 and 1,661.33

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Solution

The fourth proportional to 2,987.79, 4,123.10 and 1,661.33 is: 2,292.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.79 : 4,123.10 = 1,661.33 : x
  2. Step 2: Convert to fraction form
    2,987.79/4,123.10 = 1,661.33/x
  3. Step 3: Cross multiply
    2,987.79x = 4,123.10 × 1,661.33
  4. Step 4: Simplify right side
    2,987.79x = 6,849,800.80
  5. Step 5: Solve for x
    x = 6,849,800.80/2,987.79
  6. Step 6: Final answer
    x = 2,292.60

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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.