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Finding the Fourth Proportional to 878,858.60, 1,318,287.90 and 768,266.60

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Solution

The fourth proportional to 878,858.60, 1,318,287.90 and 768,266.60 is: 1,152,399.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,858.60 : 1,318,287.90 = 768,266.60 : x
  2. Step 2: Convert to fraction form
    878,858.60/1,318,287.90 = 768,266.60/x
  3. Step 3: Cross multiply
    878,858.60x = 1,318,287.90 × 768,266.60
  4. Step 4: Simplify right side
    878,858.60x = 1,012,796,562,754.14
  5. Step 5: Solve for x
    x = 1,012,796,562,754.14/878,858.60
  6. Step 6: Final answer
    x = 1,152,399.90

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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.