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Finding the Fourth Proportional to 613,424.80, 920,137.20 and 347,704.30

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Solution

The fourth proportional to 613,424.80, 920,137.20 and 347,704.30 is: 521,556.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,424.80 : 920,137.20 = 347,704.30 : x
  2. Step 2: Convert to fraction form
    613,424.80/920,137.20 = 347,704.30/x
  3. Step 3: Cross multiply
    613,424.80x = 920,137.20 × 347,704.30
  4. Step 4: Simplify right side
    613,424.80x = 319,935,661,029.96
  5. Step 5: Solve for x
    x = 319,935,661,029.96/613,424.80
  6. Step 6: Final answer
    x = 521,556.45

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Similar ratio
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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.