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Finding the Fourth Proportional to 436,862.70, 655,294.29 and 121,319.58

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Solution

The fourth proportional to 436,862.70, 655,294.29 and 121,319.58 is: 181,979.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,862.70 : 655,294.29 = 121,319.58 : x
  2. Step 2: Convert to fraction form
    436,862.70/655,294.29 = 121,319.58/x
  3. Step 3: Cross multiply
    436,862.70x = 655,294.29 × 121,319.58
  4. Step 4: Simplify right side
    436,862.70x = 79,500,028,039.20
  5. Step 5: Solve for x
    x = 79,500,028,039.20/436,862.70
  6. Step 6: Final answer
    x = 181,979.44

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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.