Home / 1,209,530.80-1,813,863.90-399,765.40

Finding the Fourth Proportional to 1,209,530.80, 1,813,863.90 and 399,765.40

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Solution

The fourth proportional to 1,209,530.80, 1,813,863.90 and 399,765.40 is: 599,505.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,530.80 : 1,813,863.90 = 399,765.40 : x
  2. Step 2: Convert to fraction form
    1,209,530.80/1,813,863.90 = 399,765.40/x
  3. Step 3: Cross multiply
    1,209,530.80x = 1,813,863.90 × 399,765.40
  4. Step 4: Simplify right side
    1,209,530.80x = 725,120,027,529.06
  5. Step 5: Solve for x
    x = 725,120,027,529.06/1,209,530.80
  6. Step 6: Final answer
    x = 599,505.22

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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.