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Finding the Fourth Proportional to 520,092.20, 780,138.30 and 253,893.80

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Solution

The fourth proportional to 520,092.20, 780,138.30 and 253,893.80 is: 380,840.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,092.20 : 780,138.30 = 253,893.80 : x
  2. Step 2: Convert to fraction form
    520,092.20/780,138.30 = 253,893.80/x
  3. Step 3: Cross multiply
    520,092.20x = 780,138.30 × 253,893.80
  4. Step 4: Simplify right side
    520,092.20x = 198,072,277,512.54
  5. Step 5: Solve for x
    x = 198,072,277,512.54/520,092.20
  6. Step 6: Final answer
    x = 380,840.70

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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.