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Finding the Fourth Proportional to 519,261.70, 778,892.55 and 203,728.90

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Solution

The fourth proportional to 519,261.70, 778,892.55 and 203,728.90 is: 305,593.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,261.70 : 778,892.55 = 203,728.90 : x
  2. Step 2: Convert to fraction form
    519,261.70/778,892.55 = 203,728.90/x
  3. Step 3: Cross multiply
    519,261.70x = 778,892.55 × 203,728.90
  4. Step 4: Simplify right side
    519,261.70x = 158,682,922,429.70
  5. Step 5: Solve for x
    x = 158,682,922,429.70/519,261.70
  6. Step 6: Final answer
    x = 305,593.35

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Double scale
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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.