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Finding the Fourth Proportional to 389,450.40, 584,175.60 and 220,905.60

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Solution

The fourth proportional to 389,450.40, 584,175.60 and 220,905.60 is: 331,358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,450.40 : 584,175.60 = 220,905.60 : x
  2. Step 2: Convert to fraction form
    389,450.40/584,175.60 = 220,905.60/x
  3. Step 3: Cross multiply
    389,450.40x = 584,175.60 × 220,905.60
  4. Step 4: Simplify right side
    389,450.40x = 129,047,661,423.36
  5. Step 5: Solve for x
    x = 129,047,661,423.36/389,450.40
  6. Step 6: Final answer
    x = 331,358.40

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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.