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Finding the Fourth Proportional to 485,303.20, 727,954.80 and 443,312.80

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Solution

The fourth proportional to 485,303.20, 727,954.80 and 443,312.80 is: 664,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,303.20 : 727,954.80 = 443,312.80 : x
  2. Step 2: Convert to fraction form
    485,303.20/727,954.80 = 443,312.80/x
  3. Step 3: Cross multiply
    485,303.20x = 727,954.80 × 443,312.80
  4. Step 4: Simplify right side
    485,303.20x = 322,711,680,661.44
  5. Step 5: Solve for x
    x = 322,711,680,661.44/485,303.20
  6. Step 6: Final answer
    x = 664,969.20

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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.