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Finding the Fourth Proportional to 684,803.80, 945,331.94 and 409,258.92

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Solution

The fourth proportional to 684,803.80, 945,331.94 and 409,258.92 is: 564,958.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,803.80 : 945,331.94 = 409,258.92 : x
  2. Step 2: Convert to fraction form
    684,803.80/945,331.94 = 409,258.92/x
  3. Step 3: Cross multiply
    684,803.80x = 945,331.94 × 409,258.92
  4. Step 4: Simplify right side
    684,803.80x = 386,885,528,805.91
  5. Step 5: Solve for x
    x = 386,885,528,805.91/684,803.80
  6. Step 6: Final answer
    x = 564,958.21

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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.