Home / 1,672.20-2,307.87-1,392.03

Finding the Fourth Proportional to 1,672.20, 2,307.87 and 1,392.03

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Solution

The fourth proportional to 1,672.20, 2,307.87 and 1,392.03 is: 1,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.20 : 2,307.87 = 1,392.03 : x
  2. Step 2: Convert to fraction form
    1,672.20/2,307.87 = 1,392.03/x
  3. Step 3: Cross multiply
    1,672.20x = 2,307.87 × 1,392.03
  4. Step 4: Simplify right side
    1,672.20x = 3,212,624.28
  5. Step 5: Solve for x
    x = 3,212,624.28/1,672.20
  6. Step 6: Final answer
    x = 1,921.20

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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.