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Finding the Fourth Proportional to 1,228.92, 1,695.94 and 756.64

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Solution

The fourth proportional to 1,228.92, 1,695.94 and 756.64 is: 1,044.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.92 : 1,695.94 = 756.64 : x
  2. Step 2: Convert to fraction form
    1,228.92/1,695.94 = 756.64/x
  3. Step 3: Cross multiply
    1,228.92x = 1,695.94 × 756.64
  4. Step 4: Simplify right side
    1,228.92x = 1,283,216.04
  5. Step 5: Solve for x
    x = 1,283,216.04/1,228.92
  6. Step 6: Final answer
    x = 1,044.18

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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.