Home / 663,834.80-916,174.32-405,658.64

Finding the Fourth Proportional to 663,834.80, 916,174.32 and 405,658.64

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Solution

The fourth proportional to 663,834.80, 916,174.32 and 405,658.64 is: 559,859.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,834.80 : 916,174.32 = 405,658.64 : x
  2. Step 2: Convert to fraction form
    663,834.80/916,174.32 = 405,658.64/x
  3. Step 3: Cross multiply
    663,834.80x = 916,174.32 × 405,658.64
  4. Step 4: Simplify right side
    663,834.80x = 371,654,028,654.13
  5. Step 5: Solve for x
    x = 371,654,028,654.13/663,834.80
  6. Step 6: Final answer
    x = 559,859.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.