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Finding the Fourth Proportional to 730.86, 1,006.14 and 636.30

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Solution

The fourth proportional to 730.86, 1,006.14 and 636.30 is: 875.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.86 : 1,006.14 = 636.30 : x
  2. Step 2: Convert to fraction form
    730.86/1,006.14 = 636.30/x
  3. Step 3: Cross multiply
    730.86x = 1,006.14 × 636.30
  4. Step 4: Simplify right side
    730.86x = 640,206.88
  5. Step 5: Solve for x
    x = 640,206.88/730.86
  6. Step 6: Final answer
    x = 875.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.