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Finding the Fourth Proportional to 643,865.60, 888,773.11 and 552,856.03

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Solution

The fourth proportional to 643,865.60, 888,773.11 and 552,856.03 is: 763,146.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,865.60 : 888,773.11 = 552,856.03 : x
  2. Step 2: Convert to fraction form
    643,865.60/888,773.11 = 552,856.03/x
  3. Step 3: Cross multiply
    643,865.60x = 888,773.11 × 552,856.03
  4. Step 4: Simplify right side
    643,865.60x = 491,363,569,561.28
  5. Step 5: Solve for x
    x = 491,363,569,561.28/643,865.60
  6. Step 6: Final answer
    x = 763,146.17

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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.