Home / 690,661.98-1,036,141.20-391,285.98

Finding the Fourth Proportional to 690,661.98, 1,036,141.20 and 391,285.98

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Solution

The fourth proportional to 690,661.98, 1,036,141.20 and 391,285.98 is: 587,012.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,661.98 : 1,036,141.20 = 391,285.98 : x
  2. Step 2: Convert to fraction form
    690,661.98/1,036,141.20 = 391,285.98/x
  3. Step 3: Cross multiply
    690,661.98x = 1,036,141.20 × 391,285.98
  4. Step 4: Simplify right side
    690,661.98x = 405,427,524,860.38
  5. Step 5: Solve for x
    x = 405,427,524,860.38/690,661.98
  6. Step 6: Final answer
    x = 587,012.95

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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.