Home / 765,912.70-1,056,988.20-421,763.55

Finding the Fourth Proportional to 765,912.70, 1,056,988.20 and 421,763.55

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Solution

The fourth proportional to 765,912.70, 1,056,988.20 and 421,763.55 is: 582,049.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,912.70 : 1,056,988.20 = 421,763.55 : x
  2. Step 2: Convert to fraction form
    765,912.70/1,056,988.20 = 421,763.55/x
  3. Step 3: Cross multiply
    765,912.70x = 1,056,988.20 × 421,763.55
  4. Step 4: Simplify right side
    765,912.70x = 445,799,095,540.11
  5. Step 5: Solve for x
    x = 445,799,095,540.11/765,912.70
  6. Step 6: Final answer
    x = 582,049.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.