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Finding the Fourth Proportional to 378,021.20, 567,031.80 and 347,840.60

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Solution

The fourth proportional to 378,021.20, 567,031.80 and 347,840.60 is: 521,760.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,021.20 : 567,031.80 = 347,840.60 : x
  2. Step 2: Convert to fraction form
    378,021.20/567,031.80 = 347,840.60/x
  3. Step 3: Cross multiply
    378,021.20x = 567,031.80 × 347,840.60
  4. Step 4: Simplify right side
    378,021.20x = 197,236,681,531.08
  5. Step 5: Solve for x
    x = 197,236,681,531.08/378,021.20
  6. Step 6: Final answer
    x = 521,760.90

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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.