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Finding the Fourth Proportional to 636,387.84, 878,348.76 and 403,664.28

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Solution

The fourth proportional to 636,387.84, 878,348.76 and 403,664.28 is: 557,141.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,387.84 : 878,348.76 = 403,664.28 : x
  2. Step 2: Convert to fraction form
    636,387.84/878,348.76 = 403,664.28/x
  3. Step 3: Cross multiply
    636,387.84x = 878,348.76 × 403,664.28
  4. Step 4: Simplify right side
    636,387.84x = 354,558,019,794.29
  5. Step 5: Solve for x
    x = 354,558,019,794.29/636,387.84
  6. Step 6: Final answer
    x = 557,141.41

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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.