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Finding the Fourth Proportional to 519,138.40, 778,131.60 and 203,490.40

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Solution

The fourth proportional to 519,138.40, 778,131.60 and 203,490.40 is: 305,009.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,138.40 : 778,131.60 = 203,490.40 : x
  2. Step 2: Convert to fraction form
    519,138.40/778,131.60 = 203,490.40/x
  3. Step 3: Cross multiply
    519,138.40x = 778,131.60 × 203,490.40
  4. Step 4: Simplify right side
    519,138.40x = 158,342,310,536.64
  5. Step 5: Solve for x
    x = 158,342,310,536.64/519,138.40
  6. Step 6: Final answer
    x = 305,009.82

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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.