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Finding the Fourth Proportional to 287,090.87, 430,732.89 and 127,144.62

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Solution

The fourth proportional to 287,090.87, 430,732.89 and 127,144.62 is: 190,759.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,090.87 : 430,732.89 = 127,144.62 : x
  2. Step 2: Convert to fraction form
    287,090.87/430,732.89 = 127,144.62/x
  3. Step 3: Cross multiply
    287,090.87x = 430,732.89 × 127,144.62
  4. Step 4: Simplify right side
    287,090.87x = 54,765,369,620.55
  5. Step 5: Solve for x
    x = 54,765,369,620.55/287,090.87
  6. Step 6: Final answer
    x = 190,759.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.