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Finding the Fourth Proportional to 405,268.80, 607,903.68 and 105,749.16

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Solution

The fourth proportional to 405,268.80, 607,903.68 and 105,749.16 is: 158,623.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,268.80 : 607,903.68 = 105,749.16 : x
  2. Step 2: Convert to fraction form
    405,268.80/607,903.68 = 105,749.16/x
  3. Step 3: Cross multiply
    405,268.80x = 607,903.68 × 105,749.16
  4. Step 4: Simplify right side
    405,268.80x = 64,285,303,520.91
  5. Step 5: Solve for x
    x = 64,285,303,520.91/405,268.80
  6. Step 6: Final answer
    x = 158,623.87

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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.