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Finding the Fourth Proportional to 391,570.40, 586,189.20 and 233,717.60

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Solution

The fourth proportional to 391,570.40, 586,189.20 and 233,717.60 is: 349,880.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,570.40 : 586,189.20 = 233,717.60 : x
  2. Step 2: Convert to fraction form
    391,570.40/586,189.20 = 233,717.60/x
  3. Step 3: Cross multiply
    391,570.40x = 586,189.20 × 233,717.60
  4. Step 4: Simplify right side
    391,570.40x = 137,002,732,969.92
  5. Step 5: Solve for x
    x = 137,002,732,969.92/391,570.40
  6. Step 6: Final answer
    x = 349,880.21

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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.