Home / 1,320,564.69-1,979,073.14-720,626.85

Finding the Fourth Proportional to 1,320,564.69, 1,979,073.14 and 720,626.85

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Solution

The fourth proportional to 1,320,564.69, 1,979,073.14 and 720,626.85 is: 1,079,972.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,564.69 : 1,979,073.14 = 720,626.85 : x
  2. Step 2: Convert to fraction form
    1,320,564.69/1,979,073.14 = 720,626.85/x
  3. Step 3: Cross multiply
    1,320,564.69x = 1,979,073.14 × 720,626.85
  4. Step 4: Simplify right side
    1,320,564.69x = 1,426,173,239,194.67
  5. Step 5: Solve for x
    x = 1,426,173,239,194.67/1,320,564.69
  6. Step 6: Final answer
    x = 1,079,972.26

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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.