Home / 690,709.48-1,036,212.45-391,333.48

Finding the Fourth Proportional to 690,709.48, 1,036,212.45 and 391,333.48

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Solution

The fourth proportional to 690,709.48, 1,036,212.45 and 391,333.48 is: 587,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,709.48 : 1,036,212.45 = 391,333.48 : x
  2. Step 2: Convert to fraction form
    690,709.48/1,036,212.45 = 391,333.48/x
  3. Step 3: Cross multiply
    690,709.48x = 1,036,212.45 × 391,333.48
  4. Step 4: Simplify right side
    690,709.48x = 405,504,624,077.83
  5. Step 5: Solve for x
    x = 405,504,624,077.83/690,709.48
  6. Step 6: Final answer
    x = 587,084.20

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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.