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Finding the Fourth Proportional to 636,378.72, 878,205.94 and 349,917.26

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Solution

The fourth proportional to 636,378.72, 878,205.94 and 349,917.26 is: 482,887.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,378.72 : 878,205.94 = 349,917.26 : x
  2. Step 2: Convert to fraction form
    636,378.72/878,205.94 = 349,917.26/x
  3. Step 3: Cross multiply
    636,378.72x = 878,205.94 × 349,917.26
  4. Step 4: Simplify right side
    636,378.72x = 307,299,416,240.52
  5. Step 5: Solve for x
    x = 307,299,416,240.52/636,378.72
  6. Step 6: Final answer
    x = 482,887.64

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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.