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Finding the Fourth Proportional to 287,684.65, 396,996.55 and 160,357.51

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Solution

The fourth proportional to 287,684.65, 396,996.55 and 160,357.51 is: 221,288.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,684.65 : 396,996.55 = 160,357.51 : x
  2. Step 2: Convert to fraction form
    287,684.65/396,996.55 = 160,357.51/x
  3. Step 3: Cross multiply
    287,684.65x = 396,996.55 × 160,357.51
  4. Step 4: Simplify right side
    287,684.65x = 63,661,378,236.59
  5. Step 5: Solve for x
    x = 63,661,378,236.59/287,684.65
  6. Step 6: Final answer
    x = 221,288.76

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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.