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Finding the Fourth Proportional to 217,815.80, 305,564.20 and 217,815.80

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Solution

The fourth proportional to 217,815.80, 305,564.20 and 217,815.80 is: 305,564.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,815.80 : 305,564.20 = 217,815.80 : x
  2. Step 2: Convert to fraction form
    217,815.80/305,564.20 = 217,815.80/x
  3. Step 3: Cross multiply
    217,815.80x = 305,564.20 × 217,815.80
  4. Step 4: Simplify right side
    217,815.80x = 66,556,710,674.36
  5. Step 5: Solve for x
    x = 66,556,710,674.36/217,815.80
  6. Step 6: Final answer
    x = 305,564.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.