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Finding the Fourth Proportional to 425,163.78, 636,247.80 and 265,314.95

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Solution

The fourth proportional to 425,163.78, 636,247.80 and 265,314.95 is: 397,037.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,163.78 : 636,247.80 = 265,314.95 : x
  2. Step 2: Convert to fraction form
    425,163.78/636,247.80 = 265,314.95/x
  3. Step 3: Cross multiply
    425,163.78x = 636,247.80 × 265,314.95
  4. Step 4: Simplify right side
    425,163.78x = 168,806,050,063.37
  5. Step 5: Solve for x
    x = 168,806,050,063.37/425,163.78
  6. Step 6: Final answer
    x = 397,037.70

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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.