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Finding the Fourth Proportional to 636,795.60, 878,759.52 and 346,398

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Solution

The fourth proportional to 636,795.60, 878,759.52 and 346,398 is: 478,019.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,795.60 : 878,759.52 = 346,398 : x
  2. Step 2: Convert to fraction form
    636,795.60/878,759.52 = 346,398/x
  3. Step 3: Cross multiply
    636,795.60x = 878,759.52 × 346,398
  4. Step 4: Simplify right side
    636,795.60x = 304,400,540,208.96
  5. Step 5: Solve for x
    x = 304,400,540,208.96/636,795.60
  6. Step 6: Final answer
    x = 478,019.23

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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.