Home / 1,722.15-2,376.61-936.20

Finding the Fourth Proportional to 1,722.15, 2,376.61 and 936.20

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Solution

The fourth proportional to 1,722.15, 2,376.61 and 936.20 is: 1,291.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.15 : 2,376.61 = 936.20 : x
  2. Step 2: Convert to fraction form
    1,722.15/2,376.61 = 936.20/x
  3. Step 3: Cross multiply
    1,722.15x = 2,376.61 × 936.20
  4. Step 4: Simplify right side
    1,722.15x = 2,224,985.88
  5. Step 5: Solve for x
    x = 2,224,985.88/1,722.15
  6. Step 6: Final answer
    x = 1,291.98

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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.