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Finding the Fourth Proportional to 1,266.56, 1,900 and 400.56

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Solution

The fourth proportional to 1,266.56, 1,900 and 400.56 is: 600.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.56 : 1,900 = 400.56 : x
  2. Step 2: Convert to fraction form
    1,266.56/1,900 = 400.56/x
  3. Step 3: Cross multiply
    1,266.56x = 1,900 × 400.56
  4. Step 4: Simplify right side
    1,266.56x = 761,064
  5. Step 5: Solve for x
    x = 761,064/1,266.56
  6. Step 6: Final answer
    x = 600.89

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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.