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Finding the Fourth Proportional to 636,378.48, 878,205.59 and 349,917.01

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Solution

The fourth proportional to 636,378.48, 878,205.59 and 349,917.01 is: 482,887.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,378.48 : 878,205.59 = 349,917.01 : x
  2. Step 2: Convert to fraction form
    636,378.48/878,205.59 = 349,917.01/x
  3. Step 3: Cross multiply
    636,378.48x = 878,205.59 × 349,917.01
  4. Step 4: Simplify right side
    636,378.48x = 307,299,074,218.09
  5. Step 5: Solve for x
    x = 307,299,074,218.09/636,378.48
  6. Step 6: Final answer
    x = 482,887.28

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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.