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Finding the Fourth Proportional to 519,991, 717,592.35 and 305,134.54

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Solution

The fourth proportional to 519,991, 717,592.35 and 305,134.54 is: 421,088.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,991 : 717,592.35 = 305,134.54 : x
  2. Step 2: Convert to fraction form
    519,991/717,592.35 = 305,134.54/x
  3. Step 3: Cross multiply
    519,991x = 717,592.35 × 305,134.54
  4. Step 4: Simplify right side
    519,991x = 218,962,211,624.77
  5. Step 5: Solve for x
    x = 218,962,211,624.77/519,991
  6. Step 6: Final answer
    x = 421,088.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.