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Finding the Fourth Proportional to 1,270.59, 1,752.78 and 851.03

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Solution

The fourth proportional to 1,270.59, 1,752.78 and 851.03 is: 1,174.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.59 : 1,752.78 = 851.03 : x
  2. Step 2: Convert to fraction form
    1,270.59/1,752.78 = 851.03/x
  3. Step 3: Cross multiply
    1,270.59x = 1,752.78 × 851.03
  4. Step 4: Simplify right side
    1,270.59x = 1,491,669.36
  5. Step 5: Solve for x
    x = 1,491,669.36/1,270.59
  6. Step 6: Final answer
    x = 1,174.00

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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.