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Finding the Fourth Proportional to 389,340.40, 584,010.60 and 264,002.80

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Solution

The fourth proportional to 389,340.40, 584,010.60 and 264,002.80 is: 396,004.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,340.40 : 584,010.60 = 264,002.80 : x
  2. Step 2: Convert to fraction form
    389,340.40/584,010.60 = 264,002.80/x
  3. Step 3: Cross multiply
    389,340.40x = 584,010.60 × 264,002.80
  4. Step 4: Simplify right side
    389,340.40x = 154,180,433,629.68
  5. Step 5: Solve for x
    x = 154,180,433,629.68/389,340.40
  6. Step 6: Final answer
    x = 396,004.20

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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.