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Finding the Fourth Proportional to 1,266.77, 1,899.93 and 342.43

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Solution

The fourth proportional to 1,266.77, 1,899.93 and 342.43 is: 513.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.77 : 1,899.93 = 342.43 : x
  2. Step 2: Convert to fraction form
    1,266.77/1,899.93 = 342.43/x
  3. Step 3: Cross multiply
    1,266.77x = 1,899.93 × 342.43
  4. Step 4: Simplify right side
    1,266.77x = 650,593.03
  5. Step 5: Solve for x
    x = 650,593.03/1,266.77
  6. Step 6: Final answer
    x = 513.58

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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.