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Finding the Fourth Proportional to 878,857.60, 1,318,209.60 and 287,881.60

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Solution

The fourth proportional to 878,857.60, 1,318,209.60 and 287,881.60 is: 431,797.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,857.60 : 1,318,209.60 = 287,881.60 : x
  2. Step 2: Convert to fraction form
    878,857.60/1,318,209.60 = 287,881.60/x
  3. Step 3: Cross multiply
    878,857.60x = 1,318,209.60 × 287,881.60
  4. Step 4: Simplify right side
    878,857.60x = 379,488,288,783.36
  5. Step 5: Solve for x
    x = 379,488,288,783.36/878,857.60
  6. Step 6: Final answer
    x = 431,797.24

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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.