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Finding the Fourth Proportional to 395,439.76, 593,037.07 and 142,687.57

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Solution

The fourth proportional to 395,439.76, 593,037.07 and 142,687.57 is: 213,987.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,439.76 : 593,037.07 = 142,687.57 : x
  2. Step 2: Convert to fraction form
    395,439.76/593,037.07 = 142,687.57/x
  3. Step 3: Cross multiply
    395,439.76x = 593,037.07 × 142,687.57
  4. Step 4: Simplify right side
    395,439.76x = 84,619,018,438.22
  5. Step 5: Solve for x
    x = 84,619,018,438.22/395,439.76
  6. Step 6: Final answer
    x = 213,987.13

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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.