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Finding the Fourth Proportional to 355,272.60, 532,908.90 and 285,288.60

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Solution

The fourth proportional to 355,272.60, 532,908.90 and 285,288.60 is: 427,932.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,272.60 : 532,908.90 = 285,288.60 : x
  2. Step 2: Convert to fraction form
    355,272.60/532,908.90 = 285,288.60/x
  3. Step 3: Cross multiply
    355,272.60x = 532,908.90 × 285,288.60
  4. Step 4: Simplify right side
    355,272.60x = 152,032,834,008.54
  5. Step 5: Solve for x
    x = 152,032,834,008.54/355,272.60
  6. Step 6: Final answer
    x = 427,932.90

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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.