Home / 1,320,220.55-1,980,639.74-409,355.10

Finding the Fourth Proportional to 1,320,220.55, 1,980,639.74 and 409,355.10

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Solution

The fourth proportional to 1,320,220.55, 1,980,639.74 and 409,355.10 is: 614,128.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,220.55 : 1,980,639.74 = 409,355.10 : x
  2. Step 2: Convert to fraction form
    1,320,220.55/1,980,639.74 = 409,355.10/x
  3. Step 3: Cross multiply
    1,320,220.55x = 1,980,639.74 × 409,355.10
  4. Step 4: Simplify right side
    1,320,220.55x = 810,784,979,855.06
  5. Step 5: Solve for x
    x = 810,784,979,855.06/1,320,220.55
  6. Step 6: Final answer
    x = 614,128.43

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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.