Home / 1,389,487.80-2,084,231.70-442,954.20

Finding the Fourth Proportional to 1,389,487.80, 2,084,231.70 and 442,954.20

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Solution

The fourth proportional to 1,389,487.80, 2,084,231.70 and 442,954.20 is: 664,431.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,487.80 : 2,084,231.70 = 442,954.20 : x
  2. Step 2: Convert to fraction form
    1,389,487.80/2,084,231.70 = 442,954.20/x
  3. Step 3: Cross multiply
    1,389,487.80x = 2,084,231.70 × 442,954.20
  4. Step 4: Simplify right side
    1,389,487.80x = 923,219,185,288.14
  5. Step 5: Solve for x
    x = 923,219,185,288.14/1,389,487.80
  6. Step 6: Final answer
    x = 664,431.30

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Double scale
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1.5x scale

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.