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Finding the Fourth Proportional to 1,131.90, 1,698.36 and 474.27

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Solution

The fourth proportional to 1,131.90, 1,698.36 and 474.27 is: 711.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.90 : 1,698.36 = 474.27 : x
  2. Step 2: Convert to fraction form
    1,131.90/1,698.36 = 474.27/x
  3. Step 3: Cross multiply
    1,131.90x = 1,698.36 × 474.27
  4. Step 4: Simplify right side
    1,131.90x = 805,481.20
  5. Step 5: Solve for x
    x = 805,481.20/1,131.90
  6. Step 6: Final answer
    x = 711.62

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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.