Home / 1,440.29-1,986.62-1,392.08

Finding the Fourth Proportional to 1,440.29, 1,986.62 and 1,392.08

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Solution

The fourth proportional to 1,440.29, 1,986.62 and 1,392.08 is: 1,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.29 : 1,986.62 = 1,392.08 : x
  2. Step 2: Convert to fraction form
    1,440.29/1,986.62 = 1,392.08/x
  3. Step 3: Cross multiply
    1,440.29x = 1,986.62 × 1,392.08
  4. Step 4: Simplify right side
    1,440.29x = 2,765,517.08
  5. Step 5: Solve for x
    x = 2,765,517.08/1,440.29
  6. Step 6: Final answer
    x = 1,920.11

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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.