Home / 2,938.90-4,055.42-1,679.71

Finding the Fourth Proportional to 2,938.90, 4,055.42 and 1,679.71

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Solution

The fourth proportional to 2,938.90, 4,055.42 and 1,679.71 is: 2,317.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.90 : 4,055.42 = 1,679.71 : x
  2. Step 2: Convert to fraction form
    2,938.90/4,055.42 = 1,679.71/x
  3. Step 3: Cross multiply
    2,938.90x = 4,055.42 × 1,679.71
  4. Step 4: Simplify right side
    2,938.90x = 6,811,909.25
  5. Step 5: Solve for x
    x = 6,811,909.25/2,938.90
  6. Step 6: Final answer
    x = 2,317.84

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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.