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Finding the Fourth Proportional to 647,458.56, 893,338.88 and 392,803.20

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Solution

The fourth proportional to 647,458.56, 893,338.88 and 392,803.20 is: 541,975.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,458.56 : 893,338.88 = 392,803.20 : x
  2. Step 2: Convert to fraction form
    647,458.56/893,338.88 = 392,803.20/x
  3. Step 3: Cross multiply
    647,458.56x = 893,338.88 × 392,803.20
  4. Step 4: Simplify right side
    647,458.56x = 350,906,370,748.42
  5. Step 5: Solve for x
    x = 350,906,370,748.42/647,458.56
  6. Step 6: Final answer
    x = 541,975.03

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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.