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Finding the Fourth Proportional to 218,469.45, 300,970.95 and 208,379.85

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Solution

The fourth proportional to 218,469.45, 300,970.95 and 208,379.85 is: 287,071.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,469.45 : 300,970.95 = 208,379.85 : x
  2. Step 2: Convert to fraction form
    218,469.45/300,970.95 = 208,379.85/x
  3. Step 3: Cross multiply
    218,469.45x = 300,970.95 × 208,379.85
  4. Step 4: Simplify right side
    218,469.45x = 62,716,281,415.36
  5. Step 5: Solve for x
    x = 62,716,281,415.36/218,469.45
  6. Step 6: Final answer
    x = 287,071.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.