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Finding the Fourth Proportional to 287,572.65, 396,803.61 and 166,690.35

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Solution

The fourth proportional to 287,572.65, 396,803.61 and 166,690.35 is: 230,005.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,572.65 : 396,803.61 = 166,690.35 : x
  2. Step 2: Convert to fraction form
    287,572.65/396,803.61 = 166,690.35/x
  3. Step 3: Cross multiply
    287,572.65x = 396,803.61 × 166,690.35
  4. Step 4: Simplify right side
    287,572.65x = 66,143,332,632.16
  5. Step 5: Solve for x
    x = 66,143,332,632.16/287,572.65
  6. Step 6: Final answer
    x = 230,005.64

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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.