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Finding the Fourth Proportional to 405,571.32, 608,148.36 and 139,259.88

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Solution

The fourth proportional to 405,571.32, 608,148.36 and 139,259.88 is: 208,818.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,571.32 : 608,148.36 = 139,259.88 : x
  2. Step 2: Convert to fraction form
    405,571.32/608,148.36 = 139,259.88/x
  3. Step 3: Cross multiply
    405,571.32x = 608,148.36 × 139,259.88
  4. Step 4: Simplify right side
    405,571.32x = 84,690,667,635.80
  5. Step 5: Solve for x
    x = 84,690,667,635.80/405,571.32
  6. Step 6: Final answer
    x = 208,818.19

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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.