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Finding the Fourth Proportional to 405,091.52, 608,018.60 and 205,555.08

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Solution

The fourth proportional to 405,091.52, 608,018.60 and 205,555.08 is: 308,526.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,091.52 : 608,018.60 = 205,555.08 : x
  2. Step 2: Convert to fraction form
    405,091.52/608,018.60 = 205,555.08/x
  3. Step 3: Cross multiply
    405,091.52x = 608,018.60 × 205,555.08
  4. Step 4: Simplify right side
    405,091.52x = 124,981,311,964.49
  5. Step 5: Solve for x
    x = 124,981,311,964.49/405,091.52
  6. Step 6: Final answer
    x = 308,526.11

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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.