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Finding the Fourth Proportional to 621,586.97, 857,865.90 and 349,666.32

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Solution

The fourth proportional to 621,586.97, 857,865.90 and 349,666.32 is: 482,582.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,586.97 : 857,865.90 = 349,666.32 : x
  2. Step 2: Convert to fraction form
    621,586.97/857,865.90 = 349,666.32/x
  3. Step 3: Cross multiply
    621,586.97x = 857,865.90 × 349,666.32
  4. Step 4: Simplify right side
    621,586.97x = 299,966,812,306.49
  5. Step 5: Solve for x
    x = 299,966,812,306.49/621,586.97
  6. Step 6: Final answer
    x = 482,582.21

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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.