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Finding the Fourth Proportional to 287,302.71, 396,417.54 and 166,436.73

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Solution

The fourth proportional to 287,302.71, 396,417.54 and 166,436.73 is: 229,647.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,302.71 : 396,417.54 = 166,436.73 : x
  2. Step 2: Convert to fraction form
    287,302.71/396,417.54 = 166,436.73/x
  3. Step 3: Cross multiply
    287,302.71x = 396,417.54 × 166,436.73
  4. Step 4: Simplify right side
    287,302.71x = 65,978,439,072.24
  5. Step 5: Solve for x
    x = 65,978,439,072.24/287,302.71
  6. Step 6: Final answer
    x = 229,647.81

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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.