Home / 691,736.72-954,588.12-389,930.72

Finding the Fourth Proportional to 691,736.72, 954,588.12 and 389,930.72

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Solution

The fourth proportional to 691,736.72, 954,588.12 and 389,930.72 is: 538,099.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,736.72 : 954,588.12 = 389,930.72 : x
  2. Step 2: Convert to fraction form
    691,736.72/954,588.12 = 389,930.72/x
  3. Step 3: Cross multiply
    691,736.72x = 954,588.12 × 389,930.72
  4. Step 4: Simplify right side
    691,736.72x = 372,223,232,935.05
  5. Step 5: Solve for x
    x = 372,223,232,935.05/691,736.72
  6. Step 6: Final answer
    x = 538,099.57

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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.