Home / 765,911.70-1,056,986.82-421,762.55

Finding the Fourth Proportional to 765,911.70, 1,056,986.82 and 421,762.55

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Solution

The fourth proportional to 765,911.70, 1,056,986.82 and 421,762.55 is: 582,048.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,911.70 : 1,056,986.82 = 421,762.55 : x
  2. Step 2: Convert to fraction form
    765,911.70/1,056,986.82 = 421,762.55/x
  3. Step 3: Cross multiply
    765,911.70x = 1,056,986.82 × 421,762.55
  4. Step 4: Simplify right side
    765,911.70x = 445,797,451,234.66
  5. Step 5: Solve for x
    x = 445,797,451,234.66/765,911.70
  6. Step 6: Final answer
    x = 582,048.10

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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.