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Finding the Fourth Proportional to 455,776.70, 628,438.22 and 310,668.37

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Solution

The fourth proportional to 455,776.70, 628,438.22 and 310,668.37 is: 428,358.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,776.70 : 628,438.22 = 310,668.37 : x
  2. Step 2: Convert to fraction form
    455,776.70/628,438.22 = 310,668.37/x
  3. Step 3: Cross multiply
    455,776.70x = 628,438.22 × 310,668.37
  4. Step 4: Simplify right side
    455,776.70x = 195,235,877,453.10
  5. Step 5: Solve for x
    x = 195,235,877,453.10/455,776.70
  6. Step 6: Final answer
    x = 428,358.62

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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.