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Finding the Fourth Proportional to 527,879.15, 791,811.30 and 128,520.80

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Solution

The fourth proportional to 527,879.15, 791,811.30 and 128,520.80 is: 192,779.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,879.15 : 791,811.30 = 128,520.80 : x
  2. Step 2: Convert to fraction form
    527,879.15/791,811.30 = 128,520.80/x
  3. Step 3: Cross multiply
    527,879.15x = 791,811.30 × 128,520.80
  4. Step 4: Simplify right side
    527,879.15x = 101,764,221,725.04
  5. Step 5: Solve for x
    x = 101,764,221,725.04/527,879.15
  6. Step 6: Final answer
    x = 192,779.39

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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.