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Finding the Fourth Proportional to 647,297.64, 893,358.18 and 392,607.72

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Solution

The fourth proportional to 647,297.64, 893,358.18 and 392,607.72 is: 541,851.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,297.64 : 893,358.18 = 392,607.72 : x
  2. Step 2: Convert to fraction form
    647,297.64/893,358.18 = 392,607.72/x
  3. Step 3: Cross multiply
    647,297.64x = 893,358.18 × 392,607.72
  4. Step 4: Simplify right side
    647,297.64x = 350,739,318,193.15
  5. Step 5: Solve for x
    x = 350,739,318,193.15/647,297.64
  6. Step 6: Final answer
    x = 541,851.69

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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.