Home / 637,689.37-879,946.20-392,635.21

Finding the Fourth Proportional to 637,689.37, 879,946.20 and 392,635.21

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Solution

The fourth proportional to 637,689.37, 879,946.20 and 392,635.21 is: 541,796.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,689.37 : 879,946.20 = 392,635.21 : x
  2. Step 2: Convert to fraction form
    637,689.37/879,946.20 = 392,635.21/x
  3. Step 3: Cross multiply
    637,689.37x = 879,946.20 × 392,635.21
  4. Step 4: Simplify right side
    637,689.37x = 345,497,856,625.97
  5. Step 5: Solve for x
    x = 345,497,856,625.97/637,689.37
  6. Step 6: Final answer
    x = 541,796.49

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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.