Home / 1,722.32-2,583.53-423.78

Finding the Fourth Proportional to 1,722.32, 2,583.53 and 423.78

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Solution

The fourth proportional to 1,722.32, 2,583.53 and 423.78 is: 635.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.32 : 2,583.53 = 423.78 : x
  2. Step 2: Convert to fraction form
    1,722.32/2,583.53 = 423.78/x
  3. Step 3: Cross multiply
    1,722.32x = 2,583.53 × 423.78
  4. Step 4: Simplify right side
    1,722.32x = 1,094,846.22
  5. Step 5: Solve for x
    x = 1,094,846.22/1,722.32
  6. Step 6: Final answer
    x = 635.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.