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Finding the Fourth Proportional to 911.83, 1,257.95 and 597.17

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Solution

The fourth proportional to 911.83, 1,257.95 and 597.17 is: 823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.83 : 1,257.95 = 597.17 : x
  2. Step 2: Convert to fraction form
    911.83/1,257.95 = 597.17/x
  3. Step 3: Cross multiply
    911.83x = 1,257.95 × 597.17
  4. Step 4: Simplify right side
    911.83x = 751,207.02
  5. Step 5: Solve for x
    x = 751,207.02/911.83
  6. Step 6: Final answer
    x = 823.85

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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.