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Finding the Fourth Proportional to 621,758.91, 857,966.01 and 349,820.79

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Solution

The fourth proportional to 621,758.91, 857,966.01 and 349,820.79 is: 482,718.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,758.91 : 857,966.01 = 349,820.79 : x
  2. Step 2: Convert to fraction form
    621,758.91/857,966.01 = 349,820.79/x
  3. Step 3: Cross multiply
    621,758.91x = 857,966.01 × 349,820.79
  4. Step 4: Simplify right side
    621,758.91x = 300,134,347,411.35
  5. Step 5: Solve for x
    x = 300,134,347,411.35/621,758.91
  6. Step 6: Final answer
    x = 482,718.21

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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.