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Finding the Fourth Proportional to 436,668.60, 655,002.90 and 121,128.60

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Solution

The fourth proportional to 436,668.60, 655,002.90 and 121,128.60 is: 181,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,668.60 : 655,002.90 = 121,128.60 : x
  2. Step 2: Convert to fraction form
    436,668.60/655,002.90 = 121,128.60/x
  3. Step 3: Cross multiply
    436,668.60x = 655,002.90 × 121,128.60
  4. Step 4: Simplify right side
    436,668.60x = 79,339,584,272.94
  5. Step 5: Solve for x
    x = 79,339,584,272.94/436,668.60
  6. Step 6: Final answer
    x = 181,692.90

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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.