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Finding the Fourth Proportional to 690,798.72, 946,397.74 and 664,911.56

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Solution

The fourth proportional to 690,798.72, 946,397.74 and 664,911.56 is: 910,932.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,798.72 : 946,397.74 = 664,911.56 : x
  2. Step 2: Convert to fraction form
    690,798.72/946,397.74 = 664,911.56/x
  3. Step 3: Cross multiply
    690,798.72x = 946,397.74 × 664,911.56
  4. Step 4: Simplify right side
    690,798.72x = 629,270,797,683.87
  5. Step 5: Solve for x
    x = 629,270,797,683.87/690,798.72
  6. Step 6: Final answer
    x = 910,932.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.