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Finding the Fourth Proportional to 606,421.20, 909,712.80 and 206,961.60

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Solution

The fourth proportional to 606,421.20, 909,712.80 and 206,961.60 is: 310,470.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,421.20 : 909,712.80 = 206,961.60 : x
  2. Step 2: Convert to fraction form
    606,421.20/909,712.80 = 206,961.60/x
  3. Step 3: Cross multiply
    606,421.20x = 909,712.80 × 206,961.60
  4. Step 4: Simplify right side
    606,421.20x = 188,275,616,628.48
  5. Step 5: Solve for x
    x = 188,275,616,628.48/606,421.20
  6. Step 6: Final answer
    x = 310,470.04

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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.