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Finding the Fourth Proportional to 636,368.28, 878,321.88 and 403,644.66

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Solution

The fourth proportional to 636,368.28, 878,321.88 and 403,644.66 is: 557,114.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,368.28 : 878,321.88 = 403,644.66 : x
  2. Step 2: Convert to fraction form
    636,368.28/878,321.88 = 403,644.66/x
  3. Step 3: Cross multiply
    636,368.28x = 878,321.88 × 403,644.66
  4. Step 4: Simplify right side
    636,368.28x = 354,529,936,623.16
  5. Step 5: Solve for x
    x = 354,529,936,623.16/636,368.28
  6. Step 6: Final answer
    x = 557,114.41

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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.