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Finding the Fourth Proportional to 636,617.20, 878,237.22 and 381,525.52

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Solution

The fourth proportional to 636,617.20, 878,237.22 and 381,525.52 is: 526,328.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,617.20 : 878,237.22 = 381,525.52 : x
  2. Step 2: Convert to fraction form
    636,617.20/878,237.22 = 381,525.52/x
  3. Step 3: Cross multiply
    636,617.20x = 878,237.22 × 381,525.52
  4. Step 4: Simplify right side
    636,617.20x = 335,069,912,043.85
  5. Step 5: Solve for x
    x = 335,069,912,043.85/636,617.20
  6. Step 6: Final answer
    x = 526,328.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.