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Finding the Fourth Proportional to 340,285.44, 510,389.28 and 90,986.88

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Solution

The fourth proportional to 340,285.44, 510,389.28 and 90,986.88 is: 136,469.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,285.44 : 510,389.28 = 90,986.88 : x
  2. Step 2: Convert to fraction form
    340,285.44/510,389.28 = 90,986.88/x
  3. Step 3: Cross multiply
    340,285.44x = 510,389.28 × 90,986.88
  4. Step 4: Simplify right side
    340,285.44x = 46,438,728,172.65
  5. Step 5: Solve for x
    x = 46,438,728,172.65/340,285.44
  6. Step 6: Final answer
    x = 136,469.92

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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.