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Finding the Fourth Proportional to 404,020.80, 605,512.80 and 310,060.80

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Solution

The fourth proportional to 404,020.80, 605,512.80 and 310,060.80 is: 464,693.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,020.80 : 605,512.80 = 310,060.80 : x
  2. Step 2: Convert to fraction form
    404,020.80/605,512.80 = 310,060.80/x
  3. Step 3: Cross multiply
    404,020.80x = 605,512.80 × 310,060.80
  4. Step 4: Simplify right side
    404,020.80x = 187,745,783,178.24
  5. Step 5: Solve for x
    x = 187,745,783,178.24/404,020.80
  6. Step 6: Final answer
    x = 464,693.36

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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.