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Finding the Fourth Proportional to 643,463.40, 965,195.10 and 572,604.60

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Solution

The fourth proportional to 643,463.40, 965,195.10 and 572,604.60 is: 858,906.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,463.40 : 965,195.10 = 572,604.60 : x
  2. Step 2: Convert to fraction form
    643,463.40/965,195.10 = 572,604.60/x
  3. Step 3: Cross multiply
    643,463.40x = 965,195.10 × 572,604.60
  4. Step 4: Simplify right side
    643,463.40x = 552,675,154,157.46
  5. Step 5: Solve for x
    x = 552,675,154,157.46/643,463.40
  6. Step 6: Final answer
    x = 858,906.90

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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.