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Finding the Fourth Proportional to 838.99, 1,157.68 and 465.97

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Solution

The fourth proportional to 838.99, 1,157.68 and 465.97 is: 642.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.99 : 1,157.68 = 465.97 : x
  2. Step 2: Convert to fraction form
    838.99/1,157.68 = 465.97/x
  3. Step 3: Cross multiply
    838.99x = 1,157.68 × 465.97
  4. Step 4: Simplify right side
    838.99x = 539,436.03
  5. Step 5: Solve for x
    x = 539,436.03/838.99
  6. Step 6: Final answer
    x = 642.96

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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.