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Finding the Fourth Proportional to 404,373.20, 606,705.60 and 389,793.20

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Solution

The fourth proportional to 404,373.20, 606,705.60 and 389,793.20 is: 584,830.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,373.20 : 606,705.60 = 389,793.20 : x
  2. Step 2: Convert to fraction form
    404,373.20/606,705.60 = 389,793.20/x
  3. Step 3: Cross multiply
    404,373.20x = 606,705.60 × 389,793.20
  4. Step 4: Simplify right side
    404,373.20x = 236,489,717,281.92
  5. Step 5: Solve for x
    x = 236,489,717,281.92/404,373.20
  6. Step 6: Final answer
    x = 584,830.34

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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.