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Finding the Fourth Proportional to 391,983.40, 586,808.70 and 234,130.60

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Solution

The fourth proportional to 391,983.40, 586,808.70 and 234,130.60 is: 350,499.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,983.40 : 586,808.70 = 234,130.60 : x
  2. Step 2: Convert to fraction form
    391,983.40/586,808.70 = 234,130.60/x
  3. Step 3: Cross multiply
    391,983.40x = 586,808.70 × 234,130.60
  4. Step 4: Simplify right side
    391,983.40x = 137,389,873,016.22
  5. Step 5: Solve for x
    x = 137,389,873,016.22/391,983.40
  6. Step 6: Final answer
    x = 350,499.21

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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.