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Finding the Fourth Proportional to 979,657.20, 1,469,485.80 and 727,714.80

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Solution

The fourth proportional to 979,657.20, 1,469,485.80 and 727,714.80 is: 1,091,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,657.20 : 1,469,485.80 = 727,714.80 : x
  2. Step 2: Convert to fraction form
    979,657.20/1,469,485.80 = 727,714.80/x
  3. Step 3: Cross multiply
    979,657.20x = 1,469,485.80 × 727,714.80
  4. Step 4: Simplify right side
    979,657.20x = 1,069,366,565,049.84
  5. Step 5: Solve for x
    x = 1,069,366,565,049.84/979,657.20
  6. Step 6: Final answer
    x = 1,091,572.20

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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.