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Finding the Fourth Proportional to 425,907.70, 638,861.55 and 362,581.90

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Solution

The fourth proportional to 425,907.70, 638,861.55 and 362,581.90 is: 543,872.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,907.70 : 638,861.55 = 362,581.90 : x
  2. Step 2: Convert to fraction form
    425,907.70/638,861.55 = 362,581.90/x
  3. Step 3: Cross multiply
    425,907.70x = 638,861.55 × 362,581.90
  4. Step 4: Simplify right side
    425,907.70x = 231,639,634,635.95
  5. Step 5: Solve for x
    x = 231,639,634,635.95/425,907.70
  6. Step 6: Final answer
    x = 543,872.85

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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.