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Finding the Fourth Proportional to 997, 1,485.59 and 887.95

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Solution

The fourth proportional to 997, 1,485.59 and 887.95 is: 1,323.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    997 : 1,485.59 = 887.95 : x
  2. Step 2: Convert to fraction form
    997/1,485.59 = 887.95/x
  3. Step 3: Cross multiply
    997x = 1,485.59 × 887.95
  4. Step 4: Simplify right side
    997x = 1,319,129.64
  5. Step 5: Solve for x
    x = 1,319,129.64/997
  6. Step 6: Final answer
    x = 1,323.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.