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Finding the Fourth Proportional to 274,635.20, 411,722.40 and 143,307.20

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Solution

The fourth proportional to 274,635.20, 411,722.40 and 143,307.20 is: 214,840.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,635.20 : 411,722.40 = 143,307.20 : x
  2. Step 2: Convert to fraction form
    274,635.20/411,722.40 = 143,307.20/x
  3. Step 3: Cross multiply
    274,635.20x = 411,722.40 × 143,307.20
  4. Step 4: Simplify right side
    274,635.20x = 59,002,784,321.28
  5. Step 5: Solve for x
    x = 59,002,784,321.28/274,635.20
  6. Step 6: Final answer
    x = 214,840.58

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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.