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Finding the Fourth Proportional to 1,267.40, 1,748.22 and 743.42

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Solution

The fourth proportional to 1,267.40, 1,748.22 and 743.42 is: 1,025.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.40 : 1,748.22 = 743.42 : x
  2. Step 2: Convert to fraction form
    1,267.40/1,748.22 = 743.42/x
  3. Step 3: Cross multiply
    1,267.40x = 1,748.22 × 743.42
  4. Step 4: Simplify right side
    1,267.40x = 1,299,661.71
  5. Step 5: Solve for x
    x = 1,299,661.71/1,267.40
  6. Step 6: Final answer
    x = 1,025.46

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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.