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Finding the Fourth Proportional to 287,777.30, 431,665.95 and 271,447.70

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Solution

The fourth proportional to 287,777.30, 431,665.95 and 271,447.70 is: 407,171.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,777.30 : 431,665.95 = 271,447.70 : x
  2. Step 2: Convert to fraction form
    287,777.30/431,665.95 = 271,447.70/x
  3. Step 3: Cross multiply
    287,777.30x = 431,665.95 × 271,447.70
  4. Step 4: Simplify right side
    287,777.30x = 117,174,729,295.82
  5. Step 5: Solve for x
    x = 117,174,729,295.82/287,777.30
  6. Step 6: Final answer
    x = 407,171.55

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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.