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Finding the Fourth Proportional to 668,689, 1,003,195.56 and 384,561.40

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Solution

The fourth proportional to 668,689, 1,003,195.56 and 384,561.40 is: 576,935.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,689 : 1,003,195.56 = 384,561.40 : x
  2. Step 2: Convert to fraction form
    668,689/1,003,195.56 = 384,561.40/x
  3. Step 3: Cross multiply
    668,689x = 1,003,195.56 × 384,561.40
  4. Step 4: Simplify right side
    668,689x = 385,790,289,027.38
  5. Step 5: Solve for x
    x = 385,790,289,027.38/668,689
  6. Step 6: Final answer
    x = 576,935.30

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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.