Home / 2,988.18-4,123.60-1,643.78

Finding the Fourth Proportional to 2,988.18, 4,123.60 and 1,643.78

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Solution

The fourth proportional to 2,988.18, 4,123.60 and 1,643.78 is: 2,268.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.18 : 4,123.60 = 1,643.78 : x
  2. Step 2: Convert to fraction form
    2,988.18/4,123.60 = 1,643.78/x
  3. Step 3: Cross multiply
    2,988.18x = 4,123.60 × 1,643.78
  4. Step 4: Simplify right side
    2,988.18x = 6,778,293.30
  5. Step 5: Solve for x
    x = 6,778,293.30/2,988.18
  6. Step 6: Final answer
    x = 2,268.37

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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.