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Finding the Fourth Proportional to 1,317,777.60, 1,978,999.20 and 1,018,984.80

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Solution

The fourth proportional to 1,317,777.60, 1,978,999.20 and 1,018,984.80 is: 1,530,281.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,777.60 : 1,978,999.20 = 1,018,984.80 : x
  2. Step 2: Convert to fraction form
    1,317,777.60/1,978,999.20 = 1,018,984.80/x
  3. Step 3: Cross multiply
    1,317,777.60x = 1,978,999.20 × 1,018,984.80
  4. Step 4: Simplify right side
    1,317,777.60x = 2,016,570,104,012.16
  5. Step 5: Solve for x
    x = 2,016,570,104,012.16/1,317,777.60
  6. Step 6: Final answer
    x = 1,530,281.06

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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.