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Finding the Fourth Proportional to 621,406.70, 857,533.10 and 349,474.52

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Solution

The fourth proportional to 621,406.70, 857,533.10 and 349,474.52 is: 482,270.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,406.70 : 857,533.10 = 349,474.52 : x
  2. Step 2: Convert to fraction form
    621,406.70/857,533.10 = 349,474.52/x
  3. Step 3: Cross multiply
    621,406.70x = 857,533.10 × 349,474.52
  4. Step 4: Simplify right side
    621,406.70x = 299,685,968,506.61
  5. Step 5: Solve for x
    x = 299,685,968,506.61/621,406.70
  6. Step 6: Final answer
    x = 482,270.26

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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.