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Finding the Fourth Proportional to 405,190.55, 607,890.90 and 215,494.94

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Solution

The fourth proportional to 405,190.55, 607,890.90 and 215,494.94 is: 323,298.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,190.55 : 607,890.90 = 215,494.94 : x
  2. Step 2: Convert to fraction form
    405,190.55/607,890.90 = 215,494.94/x
  3. Step 3: Cross multiply
    405,190.55x = 607,890.90 × 215,494.94
  4. Step 4: Simplify right side
    405,190.55x = 130,997,413,022.05
  5. Step 5: Solve for x
    x = 130,997,413,022.05/405,190.55
  6. Step 6: Final answer
    x = 323,298.29

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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.