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Finding the Fourth Proportional to 405,016.60, 607,524.90 and 399,111.70

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Solution

The fourth proportional to 405,016.60, 607,524.90 and 399,111.70 is: 598,667.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,016.60 : 607,524.90 = 399,111.70 : x
  2. Step 2: Convert to fraction form
    405,016.60/607,524.90 = 399,111.70/x
  3. Step 3: Cross multiply
    405,016.60x = 607,524.90 × 399,111.70
  4. Step 4: Simplify right side
    405,016.60x = 242,470,295,631.33
  5. Step 5: Solve for x
    x = 242,470,295,631.33/405,016.60
  6. Step 6: Final answer
    x = 598,667.55

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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.