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Finding the Fourth Proportional to 323,408,220.40, 485,112,330.60 and 129,223,615.60

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Solution

The fourth proportional to 323,408,220.40, 485,112,330.60 and 129,223,615.60 is: 193,835,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,408,220.40 : 485,112,330.60 = 129,223,615.60 : x
  2. Step 2: Convert to fraction form
    323,408,220.40/485,112,330.60 = 129,223,615.60/x
  3. Step 3: Cross multiply
    323,408,220.40x = 485,112,330.60 × 129,223,615.60
  4. Step 4: Simplify right side
    323,408,220.40x = 62,687,969,332,274,520
  5. Step 5: Solve for x
    x = 62,687,969,332,274,520/323,408,220.40
  6. Step 6: Final answer
    x = 193,835,423.40

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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.