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Finding the Fourth Proportional to 228,279.20, 342,418.80 and 103,620.20

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Solution

The fourth proportional to 228,279.20, 342,418.80 and 103,620.20 is: 155,430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,279.20 : 342,418.80 = 103,620.20 : x
  2. Step 2: Convert to fraction form
    228,279.20/342,418.80 = 103,620.20/x
  3. Step 3: Cross multiply
    228,279.20x = 342,418.80 × 103,620.20
  4. Step 4: Simplify right side
    228,279.20x = 35,481,504,539.76
  5. Step 5: Solve for x
    x = 35,481,504,539.76/228,279.20
  6. Step 6: Final answer
    x = 155,430.30

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1.5x scale

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.