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Finding the Fourth Proportional to 1,266.57, 1,900.16 and 400.88

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Solution

The fourth proportional to 1,266.57, 1,900.16 and 400.88 is: 601.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.57 : 1,900.16 = 400.88 : x
  2. Step 2: Convert to fraction form
    1,266.57/1,900.16 = 400.88/x
  3. Step 3: Cross multiply
    1,266.57x = 1,900.16 × 400.88
  4. Step 4: Simplify right side
    1,266.57x = 761,724.64
  5. Step 5: Solve for x
    x = 761,724.64/1,266.57
  6. Step 6: Final answer
    x = 601.41

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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.