Home / 878,615.09-1,212,474.39-491,439.55

Finding the Fourth Proportional to 878,615.09, 1,212,474.39 and 491,439.55

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Solution

The fourth proportional to 878,615.09, 1,212,474.39 and 491,439.55 is: 678,178.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,615.09 : 1,212,474.39 = 491,439.55 : x
  2. Step 2: Convert to fraction form
    878,615.09/1,212,474.39 = 491,439.55/x
  3. Step 3: Cross multiply
    878,615.09x = 1,212,474.39 × 491,439.55
  4. Step 4: Simplify right side
    878,615.09x = 595,857,868,608.12
  5. Step 5: Solve for x
    x = 595,857,868,608.12/878,615.09
  6. Step 6: Final answer
    x = 678,178.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.