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Finding the Fourth Proportional to 643,817.02, 965,715.72 and 217,652.22

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Solution

The fourth proportional to 643,817.02, 965,715.72 and 217,652.22 is: 326,475.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,817.02 : 965,715.72 = 217,652.22 : x
  2. Step 2: Convert to fraction form
    643,817.02/965,715.72 = 217,652.22/x
  3. Step 3: Cross multiply
    643,817.02x = 965,715.72 × 217,652.22
  4. Step 4: Simplify right side
    643,817.02x = 210,190,170,346.90
  5. Step 5: Solve for x
    x = 210,190,170,346.90/643,817.02
  6. Step 6: Final answer
    x = 326,475.01

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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.