Home / 1,642.62-2,267.64-1,121.40

Finding the Fourth Proportional to 1,642.62, 2,267.64 and 1,121.40

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Solution

The fourth proportional to 1,642.62, 2,267.64 and 1,121.40 is: 1,548.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.62 : 2,267.64 = 1,121.40 : x
  2. Step 2: Convert to fraction form
    1,642.62/2,267.64 = 1,121.40/x
  3. Step 3: Cross multiply
    1,642.62x = 2,267.64 × 1,121.40
  4. Step 4: Simplify right side
    1,642.62x = 2,542,931.50
  5. Step 5: Solve for x
    x = 2,542,931.50/1,642.62
  6. Step 6: Final answer
    x = 1,548.09

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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.