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Finding the Fourth Proportional to 485,211.20, 727,816.80 and 450,219.20

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Solution

The fourth proportional to 485,211.20, 727,816.80 and 450,219.20 is: 675,328.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,211.20 : 727,816.80 = 450,219.20 : x
  2. Step 2: Convert to fraction form
    485,211.20/727,816.80 = 450,219.20/x
  3. Step 3: Cross multiply
    485,211.20x = 727,816.80 × 450,219.20
  4. Step 4: Simplify right side
    485,211.20x = 327,677,097,442.56
  5. Step 5: Solve for x
    x = 327,677,097,442.56/485,211.20
  6. Step 6: Final answer
    x = 675,328.80

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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.