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Finding the Fourth Proportional to 643,804.40, 888,560.02 and 371,823.41

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Solution

The fourth proportional to 643,804.40, 888,560.02 and 371,823.41 is: 513,179.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,804.40 : 888,560.02 = 371,823.41 : x
  2. Step 2: Convert to fraction form
    643,804.40/888,560.02 = 371,823.41/x
  3. Step 3: Cross multiply
    643,804.40x = 888,560.02 × 371,823.41
  4. Step 4: Simplify right side
    643,804.40x = 330,387,416,626.07
  5. Step 5: Solve for x
    x = 330,387,416,626.07/643,804.40
  6. Step 6: Final answer
    x = 513,179.81

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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.