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Finding the Fourth Proportional to 343,880.80, 515,821.20 and 107,221.60

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Solution

The fourth proportional to 343,880.80, 515,821.20 and 107,221.60 is: 160,832.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,880.80 : 515,821.20 = 107,221.60 : x
  2. Step 2: Convert to fraction form
    343,880.80/515,821.20 = 107,221.60/x
  3. Step 3: Cross multiply
    343,880.80x = 515,821.20 × 107,221.60
  4. Step 4: Simplify right side
    343,880.80x = 55,307,174,377.92
  5. Step 5: Solve for x
    x = 55,307,174,377.92/343,880.80
  6. Step 6: Final answer
    x = 160,832.40

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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.