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Finding the Fourth Proportional to 287,825.67, 397,195.65 and 166,987.71

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Solution

The fourth proportional to 287,825.67, 397,195.65 and 166,987.71 is: 230,440.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,825.67 : 397,195.65 = 166,987.71 : x
  2. Step 2: Convert to fraction form
    287,825.67/397,195.65 = 166,987.71/x
  3. Step 3: Cross multiply
    287,825.67x = 397,195.65 × 166,987.71
  4. Step 4: Simplify right side
    287,825.67x = 66,326,792,015.46
  5. Step 5: Solve for x
    x = 66,326,792,015.46/287,825.67
  6. Step 6: Final answer
    x = 230,440.85

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1.5x scale

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.