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Finding the Fourth Proportional to 620,963.28, 931,250.52 and 411,711.12

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Solution

The fourth proportional to 620,963.28, 931,250.52 and 411,711.12 is: 617,437.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,963.28 : 931,250.52 = 411,711.12 : x
  2. Step 2: Convert to fraction form
    620,963.28/931,250.52 = 411,711.12/x
  3. Step 3: Cross multiply
    620,963.28x = 931,250.52 × 411,711.12
  4. Step 4: Simplify right side
    620,963.28x = 383,406,194,589.78
  5. Step 5: Solve for x
    x = 383,406,194,589.78/620,963.28
  6. Step 6: Final answer
    x = 617,437.79

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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.