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Finding the Fourth Proportional to 519,990, 717,590.97 and 305,133.54

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Solution

The fourth proportional to 519,990, 717,590.97 and 305,133.54 is: 421,087.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,990 : 717,590.97 = 305,133.54 : x
  2. Step 2: Convert to fraction form
    519,990/717,590.97 = 305,133.54/x
  3. Step 3: Cross multiply
    519,990x = 717,590.97 × 305,133.54
  4. Step 4: Simplify right side
    519,990x = 218,961,072,948.13
  5. Step 5: Solve for x
    x = 218,961,072,948.13/519,990
  6. Step 6: Final answer
    x = 421,087.08

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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.