Home / 1,320,219.87-1,980,329.85-720,854.09

Finding the Fourth Proportional to 1,320,219.87, 1,980,329.85 and 720,854.09

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Solution

The fourth proportional to 1,320,219.87, 1,980,329.85 and 720,854.09 is: 1,081,281.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,219.87 : 1,980,329.85 = 720,854.09 : x
  2. Step 2: Convert to fraction form
    1,320,219.87/1,980,329.85 = 720,854.09/x
  3. Step 3: Cross multiply
    1,320,219.87x = 1,980,329.85 × 720,854.09
  4. Step 4: Simplify right side
    1,320,219.87x = 1,427,528,869,446.17
  5. Step 5: Solve for x
    x = 1,427,528,869,446.17/1,320,219.87
  6. Step 6: Final answer
    x = 1,081,281.16

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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.