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Finding the Fourth Proportional to 862.73, 1,190.63 and 653.54

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Solution

The fourth proportional to 862.73, 1,190.63 and 653.54 is: 901.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.73 : 1,190.63 = 653.54 : x
  2. Step 2: Convert to fraction form
    862.73/1,190.63 = 653.54/x
  3. Step 3: Cross multiply
    862.73x = 1,190.63 × 653.54
  4. Step 4: Simplify right side
    862.73x = 778,124.33
  5. Step 5: Solve for x
    x = 778,124.33/862.73
  6. Step 6: Final answer
    x = 901.93

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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.