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Finding the Fourth Proportional to 621,000.40, 931,500.60 and 355,279.90

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Solution

The fourth proportional to 621,000.40, 931,500.60 and 355,279.90 is: 532,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,000.40 : 931,500.60 = 355,279.90 : x
  2. Step 2: Convert to fraction form
    621,000.40/931,500.60 = 355,279.90/x
  3. Step 3: Cross multiply
    621,000.40x = 931,500.60 × 355,279.90
  4. Step 4: Simplify right side
    621,000.40x = 330,943,440,017.94
  5. Step 5: Solve for x
    x = 330,943,440,017.94/621,000.40
  6. Step 6: Final answer
    x = 532,919.85

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Similar ratio
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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.