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Finding the Fourth Proportional to 287,394.34, 396,603.92 and 166,605.56

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Solution

The fourth proportional to 287,394.34, 396,603.92 and 166,605.56 is: 229,915.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,394.34 : 396,603.92 = 166,605.56 : x
  2. Step 2: Convert to fraction form
    287,394.34/396,603.92 = 166,605.56/x
  3. Step 3: Cross multiply
    287,394.34x = 396,603.92 × 166,605.56
  4. Step 4: Simplify right side
    287,394.34x = 66,076,418,189.80
  5. Step 5: Solve for x
    x = 66,076,418,189.80/287,394.34
  6. Step 6: Final answer
    x = 229,915.52

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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.