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Finding the Fourth Proportional to 1,072.76, 1,608.21 and 456.92

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Solution

The fourth proportional to 1,072.76, 1,608.21 and 456.92 is: 684.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.76 : 1,608.21 = 456.92 : x
  2. Step 2: Convert to fraction form
    1,072.76/1,608.21 = 456.92/x
  3. Step 3: Cross multiply
    1,072.76x = 1,608.21 × 456.92
  4. Step 4: Simplify right side
    1,072.76x = 734,823.31
  5. Step 5: Solve for x
    x = 734,823.31/1,072.76
  6. Step 6: Final answer
    x = 684.98

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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.