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Finding the Fourth Proportional to 758.45, 1,137.47 and 210.68

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Solution

The fourth proportional to 758.45, 1,137.47 and 210.68 is: 315.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.45 : 1,137.47 = 210.68 : x
  2. Step 2: Convert to fraction form
    758.45/1,137.47 = 210.68/x
  3. Step 3: Cross multiply
    758.45x = 1,137.47 × 210.68
  4. Step 4: Simplify right side
    758.45x = 239,635.44
  5. Step 5: Solve for x
    x = 239,635.44/758.45
  6. Step 6: Final answer
    x = 315.96

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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.