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Finding the Fourth Proportional to 643,920.17, 965,661.55 and 223,097.81

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Solution

The fourth proportional to 643,920.17, 965,661.55 and 223,097.81 is: 334,570.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,920.17 : 965,661.55 = 223,097.81 : x
  2. Step 2: Convert to fraction form
    643,920.17/965,661.55 = 223,097.81/x
  3. Step 3: Cross multiply
    643,920.17x = 965,661.55 × 223,097.81
  4. Step 4: Simplify right side
    643,920.17x = 215,436,971,620.15
  5. Step 5: Solve for x
    x = 215,436,971,620.15/643,920.17
  6. Step 6: Final answer
    x = 334,570.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.