Home / 1,123,288.70-1,684,933.05-990,428.45

Finding the Fourth Proportional to 1,123,288.70, 1,684,933.05 and 990,428.45

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Solution

The fourth proportional to 1,123,288.70, 1,684,933.05 and 990,428.45 is: 1,485,642.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,288.70 : 1,684,933.05 = 990,428.45 : x
  2. Step 2: Convert to fraction form
    1,123,288.70/1,684,933.05 = 990,428.45/x
  3. Step 3: Cross multiply
    1,123,288.70x = 1,684,933.05 × 990,428.45
  4. Step 4: Simplify right side
    1,123,288.70x = 1,668,805,629,065.27
  5. Step 5: Solve for x
    x = 1,668,805,629,065.27/1,123,288.70
  6. Step 6: Final answer
    x = 1,485,642.68

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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.