Home / 878,715.08-1,318,190.70-309,962.60

Finding the Fourth Proportional to 878,715.08, 1,318,190.70 and 309,962.60

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Solution

The fourth proportional to 878,715.08, 1,318,190.70 and 309,962.60 is: 464,985.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,715.08 : 1,318,190.70 = 309,962.60 : x
  2. Step 2: Convert to fraction form
    878,715.08/1,318,190.70 = 309,962.60/x
  3. Step 3: Cross multiply
    878,715.08x = 1,318,190.70 × 309,962.60
  4. Step 4: Simplify right side
    878,715.08x = 408,589,816,667.82
  5. Step 5: Solve for x
    x = 408,589,816,667.82/878,715.08
  6. Step 6: Final answer
    x = 464,985.55

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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.