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Finding the Fourth Proportional to 636,339.60, 878,126.20 and 349,857.48

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Solution

The fourth proportional to 636,339.60, 878,126.20 and 349,857.48 is: 482,790.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,339.60 : 878,126.20 = 349,857.48 : x
  2. Step 2: Convert to fraction form
    636,339.60/878,126.20 = 349,857.48/x
  3. Step 3: Cross multiply
    636,339.60x = 878,126.20 × 349,857.48
  4. Step 4: Simplify right side
    636,339.60x = 307,219,019,453.98
  5. Step 5: Solve for x
    x = 307,219,019,453.98/636,339.60
  6. Step 6: Final answer
    x = 482,790.98

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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.