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Finding the Fourth Proportional to 287,355.99, 396,490.59 and 166,489.92

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Solution

The fourth proportional to 287,355.99, 396,490.59 and 166,489.92 is: 229,720.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,355.99 : 396,490.59 = 166,489.92 : x
  2. Step 2: Convert to fraction form
    287,355.99/396,490.59 = 166,489.92/x
  3. Step 3: Cross multiply
    287,355.99x = 396,490.59 × 166,489.92
  4. Step 4: Simplify right side
    287,355.99x = 66,011,686,609.85
  5. Step 5: Solve for x
    x = 66,011,686,609.85/287,355.99
  6. Step 6: Final answer
    x = 229,720.93

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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.