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Finding the Fourth Proportional to 391,107.40, 586,661.10 and 154,328.20

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Solution

The fourth proportional to 391,107.40, 586,661.10 and 154,328.20 is: 231,492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,107.40 : 586,661.10 = 154,328.20 : x
  2. Step 2: Convert to fraction form
    391,107.40/586,661.10 = 154,328.20/x
  3. Step 3: Cross multiply
    391,107.40x = 586,661.10 × 154,328.20
  4. Step 4: Simplify right side
    391,107.40x = 90,538,351,573.02
  5. Step 5: Solve for x
    x = 90,538,351,573.02/391,107.40
  6. Step 6: Final answer
    x = 231,492.30

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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.