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Finding the Fourth Proportional to 730.32, 1,096.92 and 646.80

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Solution

The fourth proportional to 730.32, 1,096.92 and 646.80 is: 971.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.32 : 1,096.92 = 646.80 : x
  2. Step 2: Convert to fraction form
    730.32/1,096.92 = 646.80/x
  3. Step 3: Cross multiply
    730.32x = 1,096.92 × 646.80
  4. Step 4: Simplify right side
    730.32x = 709,487.86
  5. Step 5: Solve for x
    x = 709,487.86/730.32
  6. Step 6: Final answer
    x = 971.48

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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.