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Finding the Fourth Proportional to 1,109,905.60, 1,664,858.40 and 684,752.80

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Solution

The fourth proportional to 1,109,905.60, 1,664,858.40 and 684,752.80 is: 1,027,129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109,905.60 : 1,664,858.40 = 684,752.80 : x
  2. Step 2: Convert to fraction form
    1,109,905.60/1,664,858.40 = 684,752.80/x
  3. Step 3: Cross multiply
    1,109,905.60x = 1,664,858.40 × 684,752.80
  4. Step 4: Simplify right side
    1,109,905.60x = 1,140,016,451,003.52
  5. Step 5: Solve for x
    x = 1,140,016,451,003.52/1,109,905.60
  6. Step 6: Final answer
    x = 1,027,129.20

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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.