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Finding the Fourth Proportional to 287,390.97, 396,611.71 and 160,066.55

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Solution

The fourth proportional to 287,390.97, 396,611.71 and 160,066.55 is: 220,898.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,390.97 : 396,611.71 = 160,066.55 : x
  2. Step 2: Convert to fraction form
    287,390.97/396,611.71 = 160,066.55/x
  3. Step 3: Cross multiply
    287,390.97x = 396,611.71 × 160,066.55
  4. Step 4: Simplify right side
    287,390.97x = 63,484,268,700.66
  5. Step 5: Solve for x
    x = 63,484,268,700.66/287,390.97
  6. Step 6: Final answer
    x = 220,898.62

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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.