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Finding the Fourth Proportional to 489,907.20, 734,907 and 190,410.72

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Solution

The fourth proportional to 489,907.20, 734,907 and 190,410.72 is: 285,634.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,907.20 : 734,907 = 190,410.72 : x
  2. Step 2: Convert to fraction form
    489,907.20/734,907 = 190,410.72/x
  3. Step 3: Cross multiply
    489,907.20x = 734,907 × 190,410.72
  4. Step 4: Simplify right side
    489,907.20x = 139,934,171,003.04
  5. Step 5: Solve for x
    x = 139,934,171,003.04/489,907.20
  6. Step 6: Final answer
    x = 285,634.04

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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.