Home / 1,428,418.80-1,971,121.50-783,880.32

Finding the Fourth Proportional to 1,428,418.80, 1,971,121.50 and 783,880.32

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Solution

The fourth proportional to 1,428,418.80, 1,971,121.50 and 783,880.32 is: 1,081,701.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,418.80 : 1,971,121.50 = 783,880.32 : x
  2. Step 2: Convert to fraction form
    1,428,418.80/1,971,121.50 = 783,880.32/x
  3. Step 3: Cross multiply
    1,428,418.80x = 1,971,121.50 × 783,880.32
  4. Step 4: Simplify right side
    1,428,418.80x = 1,545,123,352,178.88
  5. Step 5: Solve for x
    x = 1,545,123,352,178.88/1,428,418.80
  6. Step 6: Final answer
    x = 1,081,701.92

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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.