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Finding the Fourth Proportional to 697,096.75, 961,990.80 and 391,172.42

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Solution

The fourth proportional to 697,096.75, 961,990.80 and 391,172.42 is: 539,816.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,096.75 : 961,990.80 = 391,172.42 : x
  2. Step 2: Convert to fraction form
    697,096.75/961,990.80 = 391,172.42/x
  3. Step 3: Cross multiply
    697,096.75x = 961,990.80 × 391,172.42
  4. Step 4: Simplify right side
    697,096.75x = 376,304,269,253.74
  5. Step 5: Solve for x
    x = 376,304,269,253.74/697,096.75
  6. Step 6: Final answer
    x = 539,816.42

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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.