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Finding the Fourth Proportional to 659,141.80, 989,879.10 and 509,745.40

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Solution

The fourth proportional to 659,141.80, 989,879.10 and 509,745.40 is: 765,520.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,141.80 : 989,879.10 = 509,745.40 : x
  2. Step 2: Convert to fraction form
    659,141.80/989,879.10 = 509,745.40/x
  3. Step 3: Cross multiply
    659,141.80x = 989,879.10 × 509,745.40
  4. Step 4: Simplify right side
    659,141.80x = 504,586,317,781.14
  5. Step 5: Solve for x
    x = 504,586,317,781.14/659,141.80
  6. Step 6: Final answer
    x = 765,520.13

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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.