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Finding the Fourth Proportional to 405,347.57, 559,379.77 and 221,586.94

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Solution

The fourth proportional to 405,347.57, 559,379.77 and 221,586.94 is: 305,790.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,347.57 : 559,379.77 = 221,586.94 : x
  2. Step 2: Convert to fraction form
    405,347.57/559,379.77 = 221,586.94/x
  3. Step 3: Cross multiply
    405,347.57x = 559,379.77 × 221,586.94
  4. Step 4: Simplify right side
    405,347.57x = 123,951,253,372.79
  5. Step 5: Solve for x
    x = 123,951,253,372.79/405,347.57
  6. Step 6: Final answer
    x = 305,790.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.