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Finding the Fourth Proportional to 436,785.21, 655,181.48 and 121,266.72

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Solution

The fourth proportional to 436,785.21, 655,181.48 and 121,266.72 is: 181,901.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,785.21 : 655,181.48 = 121,266.72 : x
  2. Step 2: Convert to fraction form
    436,785.21/655,181.48 = 121,266.72/x
  3. Step 3: Cross multiply
    436,785.21x = 655,181.48 × 121,266.72
  4. Step 4: Simplify right side
    436,785.21x = 79,451,709,084.35
  5. Step 5: Solve for x
    x = 79,451,709,084.35/436,785.21
  6. Step 6: Final answer
    x = 181,901.10

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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.