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Finding the Fourth Proportional to 886,906.40, 1,330,100.40 and 318,221.60

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Solution

The fourth proportional to 886,906.40, 1,330,100.40 and 318,221.60 is: 477,239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,906.40 : 1,330,100.40 = 318,221.60 : x
  2. Step 2: Convert to fraction form
    886,906.40/1,330,100.40 = 318,221.60/x
  3. Step 3: Cross multiply
    886,906.40x = 1,330,100.40 × 318,221.60
  4. Step 4: Simplify right side
    886,906.40x = 423,266,677,448.64
  5. Step 5: Solve for x
    x = 423,266,677,448.64/886,906.40
  6. Step 6: Final answer
    x = 477,239.40

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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.