Home / 1,722.38-2,376.80-936.40

Finding the Fourth Proportional to 1,722.38, 2,376.80 and 936.40

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Solution

The fourth proportional to 1,722.38, 2,376.80 and 936.40 is: 1,292.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.38 : 2,376.80 = 936.40 : x
  2. Step 2: Convert to fraction form
    1,722.38/2,376.80 = 936.40/x
  3. Step 3: Cross multiply
    1,722.38x = 2,376.80 × 936.40
  4. Step 4: Simplify right side
    1,722.38x = 2,225,635.52
  5. Step 5: Solve for x
    x = 2,225,635.52/1,722.38
  6. Step 6: Final answer
    x = 1,292.19

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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.