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Finding the Fourth Proportional to 609,163.56, 912,746.58 and 431,351.37

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Solution

The fourth proportional to 609,163.56, 912,746.58 and 431,351.37 is: 646,319.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,163.56 : 912,746.58 = 431,351.37 : x
  2. Step 2: Convert to fraction form
    609,163.56/912,746.58 = 431,351.37/x
  3. Step 3: Cross multiply
    609,163.56x = 912,746.58 × 431,351.37
  4. Step 4: Simplify right side
    609,163.56x = 393,714,487,745.82
  5. Step 5: Solve for x
    x = 393,714,487,745.82/609,163.56
  6. Step 6: Final answer
    x = 646,319.83

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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.