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Finding the Fourth Proportional to 1,137.70, 1,706.56 and 316.22

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Solution

The fourth proportional to 1,137.70, 1,706.56 and 316.22 is: 474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.70 : 1,706.56 = 316.22 : x
  2. Step 2: Convert to fraction form
    1,137.70/1,706.56 = 316.22/x
  3. Step 3: Cross multiply
    1,137.70x = 1,706.56 × 316.22
  4. Step 4: Simplify right side
    1,137.70x = 539,651.88
  5. Step 5: Solve for x
    x = 539,651.88/1,137.70
  6. Step 6: Final answer
    x = 474.34

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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.