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Finding the Fourth Proportional to 1,226.91, 1,693.28 and 703.11

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Solution

The fourth proportional to 1,226.91, 1,693.28 and 703.11 is: 970.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.91 : 1,693.28 = 703.11 : x
  2. Step 2: Convert to fraction form
    1,226.91/1,693.28 = 703.11/x
  3. Step 3: Cross multiply
    1,226.91x = 1,693.28 × 703.11
  4. Step 4: Simplify right side
    1,226.91x = 1,190,558.59
  5. Step 5: Solve for x
    x = 1,190,558.59/1,226.91
  6. Step 6: Final answer
    x = 970.37

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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.