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Finding the Fourth Proportional to 578,138.40, 867,466.80 and 262,432.80

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Solution

The fourth proportional to 578,138.40, 867,466.80 and 262,432.80 is: 393,766.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,138.40 : 867,466.80 = 262,432.80 : x
  2. Step 2: Convert to fraction form
    578,138.40/867,466.80 = 262,432.80/x
  3. Step 3: Cross multiply
    578,138.40x = 867,466.80 × 262,432.80
  4. Step 4: Simplify right side
    578,138.40x = 227,651,741,231.04
  5. Step 5: Solve for x
    x = 227,651,741,231.04/578,138.40
  6. Step 6: Final answer
    x = 393,766.86

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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.