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Finding the Fourth Proportional to 621,008.16, 857,082 and 349,098.44

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Solution

The fourth proportional to 621,008.16, 857,082 and 349,098.44 is: 481,806.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,008.16 : 857,082 = 349,098.44 : x
  2. Step 2: Convert to fraction form
    621,008.16/857,082 = 349,098.44/x
  3. Step 3: Cross multiply
    621,008.16x = 857,082 × 349,098.44
  4. Step 4: Simplify right side
    621,008.16x = 299,205,989,152.08
  5. Step 5: Solve for x
    x = 299,205,989,152.08/621,008.16
  6. Step 6: Final answer
    x = 481,806.86

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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.