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Finding the Fourth Proportional to 405,375.18, 608,077.22 and 139,133.85

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Solution

The fourth proportional to 405,375.18, 608,077.22 and 139,133.85 is: 208,705.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,375.18 : 608,077.22 = 139,133.85 : x
  2. Step 2: Convert to fraction form
    405,375.18/608,077.22 = 139,133.85/x
  3. Step 3: Cross multiply
    405,375.18x = 608,077.22 × 139,133.85
  4. Step 4: Simplify right side
    405,375.18x = 84,604,124,020.23
  5. Step 5: Solve for x
    x = 84,604,124,020.23/405,375.18
  6. Step 6: Final answer
    x = 208,705.73

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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.