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Finding the Fourth Proportional to 1,266.56, 1,747.92 and 707.06

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Solution

The fourth proportional to 1,266.56, 1,747.92 and 707.06 is: 975.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.56 : 1,747.92 = 707.06 : x
  2. Step 2: Convert to fraction form
    1,266.56/1,747.92 = 707.06/x
  3. Step 3: Cross multiply
    1,266.56x = 1,747.92 × 707.06
  4. Step 4: Simplify right side
    1,266.56x = 1,235,884.32
  5. Step 5: Solve for x
    x = 1,235,884.32/1,266.56
  6. Step 6: Final answer
    x = 975.78

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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.