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Finding the Fourth Proportional to 888,299.60, 1,330,481.10 and 687,970.40

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Solution

The fourth proportional to 888,299.60, 1,330,481.10 and 687,970.40 is: 1,030,431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    888,299.60 : 1,330,481.10 = 687,970.40 : x
  2. Step 2: Convert to fraction form
    888,299.60/1,330,481.10 = 687,970.40/x
  3. Step 3: Cross multiply
    888,299.60x = 1,330,481.10 × 687,970.40
  4. Step 4: Simplify right side
    888,299.60x = 915,331,614,559.44
  5. Step 5: Solve for x
    x = 915,331,614,559.44/888,299.60
  6. Step 6: Final answer
    x = 1,030,431.19

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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.