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Finding the Fourth Proportional to 643,497.48, 888,050.25 and 388,799.46

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Solution

The fourth proportional to 643,497.48, 888,050.25 and 388,799.46 is: 536,557.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,497.48 : 888,050.25 = 388,799.46 : x
  2. Step 2: Convert to fraction form
    643,497.48/888,050.25 = 388,799.46/x
  3. Step 3: Cross multiply
    643,497.48x = 888,050.25 × 388,799.46
  4. Step 4: Simplify right side
    643,497.48x = 345,273,457,652.87
  5. Step 5: Solve for x
    x = 345,273,457,652.87/643,497.48
  6. Step 6: Final answer
    x = 536,557.59

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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.