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Finding the Fourth Proportional to 415,540.80, 623,311.20 and 364,219.20

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Solution

The fourth proportional to 415,540.80, 623,311.20 and 364,219.20 is: 546,328.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,540.80 : 623,311.20 = 364,219.20 : x
  2. Step 2: Convert to fraction form
    415,540.80/623,311.20 = 364,219.20/x
  3. Step 3: Cross multiply
    415,540.80x = 623,311.20 × 364,219.20
  4. Step 4: Simplify right side
    415,540.80x = 227,021,906,615.04
  5. Step 5: Solve for x
    x = 227,021,906,615.04/415,540.80
  6. Step 6: Final answer
    x = 546,328.80

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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.