Home / 1,334.39-1,988.49-1,290.29

Finding the Fourth Proportional to 1,334.39, 1,988.49 and 1,290.29

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Solution

The fourth proportional to 1,334.39, 1,988.49 and 1,290.29 is: 1,922.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.39 : 1,988.49 = 1,290.29 : x
  2. Step 2: Convert to fraction form
    1,334.39/1,988.49 = 1,290.29/x
  3. Step 3: Cross multiply
    1,334.39x = 1,988.49 × 1,290.29
  4. Step 4: Simplify right side
    1,334.39x = 2,565,722.31
  5. Step 5: Solve for x
    x = 2,565,722.31/1,334.39
  6. Step 6: Final answer
    x = 1,922.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.