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Finding the Fourth Proportional to 291,390.74, 437,163.89 and 104,421.14

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Solution

The fourth proportional to 291,390.74, 437,163.89 and 104,421.14 is: 156,659.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,390.74 : 437,163.89 = 104,421.14 : x
  2. Step 2: Convert to fraction form
    291,390.74/437,163.89 = 104,421.14/x
  3. Step 3: Cross multiply
    291,390.74x = 437,163.89 × 104,421.14
  4. Step 4: Simplify right side
    291,390.74x = 45,649,149,052.71
  5. Step 5: Solve for x
    x = 45,649,149,052.71/291,390.74
  6. Step 6: Final answer
    x = 156,659.58

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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.