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Finding the Fourth Proportional to 717,400.86, 982,843.46 and 690,495.90

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Solution

The fourth proportional to 717,400.86, 982,843.46 and 690,495.90 is: 945,983.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,400.86 : 982,843.46 = 690,495.90 : x
  2. Step 2: Convert to fraction form
    717,400.86/982,843.46 = 690,495.90/x
  3. Step 3: Cross multiply
    717,400.86x = 982,843.46 × 690,495.90
  4. Step 4: Simplify right side
    717,400.86x = 678,649,376,019.34
  5. Step 5: Solve for x
    x = 678,649,376,019.34/717,400.86
  6. Step 6: Final answer
    x = 945,983.50

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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.