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Finding the Fourth Proportional to 659,553.80, 989,003.10 and 210,216.20

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Solution

The fourth proportional to 659,553.80, 989,003.10 and 210,216.20 is: 315,219.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,553.80 : 989,003.10 = 210,216.20 : x
  2. Step 2: Convert to fraction form
    659,553.80/989,003.10 = 210,216.20/x
  3. Step 3: Cross multiply
    659,553.80x = 989,003.10 × 210,216.20
  4. Step 4: Simplify right side
    659,553.80x = 207,904,473,470.22
  5. Step 5: Solve for x
    x = 207,904,473,470.22/659,553.80
  6. Step 6: Final answer
    x = 315,219.89

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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.