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Finding the Fourth Proportional to 716,055.57, 988,163.82 and 393,767.91

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Solution

The fourth proportional to 716,055.57, 988,163.82 and 393,767.91 is: 543,403.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,055.57 : 988,163.82 = 393,767.91 : x
  2. Step 2: Convert to fraction form
    716,055.57/988,163.82 = 393,767.91/x
  3. Step 3: Cross multiply
    716,055.57x = 988,163.82 × 393,767.91
  4. Step 4: Simplify right side
    716,055.57x = 389,107,202,139.02
  5. Step 5: Solve for x
    x = 389,107,202,139.02/716,055.57
  6. Step 6: Final answer
    x = 543,403.64

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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.