Home / 1,390,405.80-2,085,608.70-443,872.20

Finding the Fourth Proportional to 1,390,405.80, 2,085,608.70 and 443,872.20

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Solution

The fourth proportional to 1,390,405.80, 2,085,608.70 and 443,872.20 is: 665,808.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,405.80 : 2,085,608.70 = 443,872.20 : x
  2. Step 2: Convert to fraction form
    1,390,405.80/2,085,608.70 = 443,872.20/x
  3. Step 3: Cross multiply
    1,390,405.80x = 2,085,608.70 × 443,872.20
  4. Step 4: Simplify right side
    1,390,405.80x = 925,743,722,008.14
  5. Step 5: Solve for x
    x = 925,743,722,008.14/1,390,405.80
  6. Step 6: Final answer
    x = 665,808.30

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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.