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Finding the Fourth Proportional to 490,707.21, 736,003.87 and 135,748.91

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Solution

The fourth proportional to 490,707.21, 736,003.87 and 135,748.91 is: 203,607.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,707.21 : 736,003.87 = 135,748.91 : x
  2. Step 2: Convert to fraction form
    490,707.21/736,003.87 = 135,748.91/x
  3. Step 3: Cross multiply
    490,707.21x = 736,003.87 × 135,748.91
  4. Step 4: Simplify right side
    490,707.21x = 99,911,724,608.92
  5. Step 5: Solve for x
    x = 99,911,724,608.92/490,707.21
  6. Step 6: Final answer
    x = 203,607.61

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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.