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Finding the Fourth Proportional to 389,627.60, 584,149.80 and 212,334.80

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Solution

The fourth proportional to 389,627.60, 584,149.80 and 212,334.80 is: 318,343.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,627.60 : 584,149.80 = 212,334.80 : x
  2. Step 2: Convert to fraction form
    389,627.60/584,149.80 = 212,334.80/x
  3. Step 3: Cross multiply
    389,627.60x = 584,149.80 × 212,334.80
  4. Step 4: Simplify right side
    389,627.60x = 124,035,330,953.04
  5. Step 5: Solve for x
    x = 124,035,330,953.04/389,627.60
  6. Step 6: Final answer
    x = 318,343.29

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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.