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Finding the Fourth Proportional to 606,205.20, 909,221.40 and 206,864.40

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Solution

The fourth proportional to 606,205.20, 909,221.40 and 206,864.40 is: 310,267.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,205.20 : 909,221.40 = 206,864.40 : x
  2. Step 2: Convert to fraction form
    606,205.20/909,221.40 = 206,864.40/x
  3. Step 3: Cross multiply
    606,205.20x = 909,221.40 × 206,864.40
  4. Step 4: Simplify right side
    606,205.20x = 188,085,539,378.16
  5. Step 5: Solve for x
    x = 188,085,539,378.16/606,205.20
  6. Step 6: Final answer
    x = 310,267.12

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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.