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Finding the Fourth Proportional to 621,269.71, 930,538.60 and 513,431.48

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Solution

The fourth proportional to 621,269.71, 930,538.60 and 513,431.48 is: 769,018.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,269.71 : 930,538.60 = 513,431.48 : x
  2. Step 2: Convert to fraction form
    621,269.71/930,538.60 = 513,431.48/x
  3. Step 3: Cross multiply
    621,269.71x = 930,538.60 × 513,431.48
  4. Step 4: Simplify right side
    621,269.71x = 477,767,811,637.90
  5. Step 5: Solve for x
    x = 477,767,811,637.90/621,269.71
  6. Step 6: Final answer
    x = 769,018.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.