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Finding the Fourth Proportional to 636,367.28, 878,320.50 and 403,643.66

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Solution

The fourth proportional to 636,367.28, 878,320.50 and 403,643.66 is: 557,113.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,367.28 : 878,320.50 = 403,643.66 : x
  2. Step 2: Convert to fraction form
    636,367.28/878,320.50 = 403,643.66/x
  3. Step 3: Cross multiply
    636,367.28x = 878,320.50 × 403,643.66
  4. Step 4: Simplify right side
    636,367.28x = 354,528,501,273.03
  5. Step 5: Solve for x
    x = 354,528,501,273.03/636,367.28
  6. Step 6: Final answer
    x = 557,113.03

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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.