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Finding the Fourth Proportional to 321,240.36, 443,299.74 and 185,280

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Solution

The fourth proportional to 321,240.36, 443,299.74 and 185,280 is: 255,679.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,240.36 : 443,299.74 = 185,280 : x
  2. Step 2: Convert to fraction form
    321,240.36/443,299.74 = 185,280/x
  3. Step 3: Cross multiply
    321,240.36x = 443,299.74 × 185,280
  4. Step 4: Simplify right side
    321,240.36x = 82,134,575,827.20
  5. Step 5: Solve for x
    x = 82,134,575,827.20/321,240.36
  6. Step 6: Final answer
    x = 255,679.50

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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.