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Finding the Fourth Proportional to 841.15, 1,262.15 and 636.97

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Solution

The fourth proportional to 841.15, 1,262.15 and 636.97 is: 955.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.15 : 1,262.15 = 636.97 : x
  2. Step 2: Convert to fraction form
    841.15/1,262.15 = 636.97/x
  3. Step 3: Cross multiply
    841.15x = 1,262.15 × 636.97
  4. Step 4: Simplify right side
    841.15x = 803,942.19
  5. Step 5: Solve for x
    x = 803,942.19/841.15
  6. Step 6: Final answer
    x = 955.77

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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.