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Finding the Fourth Proportional to 1,267.56, 1,901.60 and 487.56

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Solution

The fourth proportional to 1,267.56, 1,901.60 and 487.56 is: 731.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.56 : 1,901.60 = 487.56 : x
  2. Step 2: Convert to fraction form
    1,267.56/1,901.60 = 487.56/x
  3. Step 3: Cross multiply
    1,267.56x = 1,901.60 × 487.56
  4. Step 4: Simplify right side
    1,267.56x = 927,144.10
  5. Step 5: Solve for x
    x = 927,144.10/1,267.56
  6. Step 6: Final answer
    x = 731.44

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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.