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Finding the Fourth Proportional to 886,712.60, 1,330,263.30 and 287,571.80

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Solution

The fourth proportional to 886,712.60, 1,330,263.30 and 287,571.80 is: 431,420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,712.60 : 1,330,263.30 = 287,571.80 : x
  2. Step 2: Convert to fraction form
    886,712.60/1,330,263.30 = 287,571.80/x
  3. Step 3: Cross multiply
    886,712.60x = 1,330,263.30 × 287,571.80
  4. Step 4: Simplify right side
    886,712.60x = 382,546,211,654.94
  5. Step 5: Solve for x
    x = 382,546,211,654.94/886,712.60
  6. Step 6: Final answer
    x = 431,420.75

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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.