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Finding the Fourth Proportional to 436,809.78, 655,214.40 and 121,266.60

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Solution

The fourth proportional to 436,809.78, 655,214.40 and 121,266.60 is: 181,899.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,809.78 : 655,214.40 = 121,266.60 : x
  2. Step 2: Convert to fraction form
    436,809.78/655,214.40 = 121,266.60/x
  3. Step 3: Cross multiply
    436,809.78x = 655,214.40 × 121,266.60
  4. Step 4: Simplify right side
    436,809.78x = 79,455,622,559.04
  5. Step 5: Solve for x
    x = 79,455,622,559.04/436,809.78
  6. Step 6: Final answer
    x = 181,899.83

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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.