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Finding the Fourth Proportional to 485,324.40, 727,986.60 and 317,362.80

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Solution

The fourth proportional to 485,324.40, 727,986.60 and 317,362.80 is: 476,044.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,324.40 : 727,986.60 = 317,362.80 : x
  2. Step 2: Convert to fraction form
    485,324.40/727,986.60 = 317,362.80/x
  3. Step 3: Cross multiply
    485,324.40x = 727,986.60 × 317,362.80
  4. Step 4: Simplify right side
    485,324.40x = 231,035,865,738.48
  5. Step 5: Solve for x
    x = 231,035,865,738.48/485,324.40
  6. Step 6: Final answer
    x = 476,044.20

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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.