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Finding the Fourth Proportional to 719,338.72, 992,672.10 and 392,640.88

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Solution

The fourth proportional to 719,338.72, 992,672.10 and 392,640.88 is: 541,836.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,338.72 : 992,672.10 = 392,640.88 : x
  2. Step 2: Convert to fraction form
    719,338.72/992,672.10 = 392,640.88/x
  3. Step 3: Cross multiply
    719,338.72x = 992,672.10 × 392,640.88
  4. Step 4: Simplify right side
    719,338.72x = 389,763,646,895.45
  5. Step 5: Solve for x
    x = 389,763,646,895.45/719,338.72
  6. Step 6: Final answer
    x = 541,836.04

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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.