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Finding the Fourth Proportional to 405,653.10, 608,479.65 and 366,945.90

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Solution

The fourth proportional to 405,653.10, 608,479.65 and 366,945.90 is: 550,418.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,653.10 : 608,479.65 = 366,945.90 : x
  2. Step 2: Convert to fraction form
    405,653.10/608,479.65 = 366,945.90/x
  3. Step 3: Cross multiply
    405,653.10x = 608,479.65 × 366,945.90
  4. Step 4: Simplify right side
    405,653.10x = 223,279,112,800.94
  5. Step 5: Solve for x
    x = 223,279,112,800.94/405,653.10
  6. Step 6: Final answer
    x = 550,418.85

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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.