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Finding the Fourth Proportional to 287,143.30, 396,151.47 and 286,700.44

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Solution

The fourth proportional to 287,143.30, 396,151.47 and 286,700.44 is: 395,540.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,143.30 : 396,151.47 = 286,700.44 : x
  2. Step 2: Convert to fraction form
    287,143.30/396,151.47 = 286,700.44/x
  3. Step 3: Cross multiply
    287,143.30x = 396,151.47 × 286,700.44
  4. Step 4: Simplify right side
    287,143.30x = 113,576,799,797.05
  5. Step 5: Solve for x
    x = 113,576,799,797.05/287,143.30
  6. Step 6: Final answer
    x = 395,540.48

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.