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Finding the Fourth Proportional to 436,779.72, 655,173.21 and 121,261.23

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Solution

The fourth proportional to 436,779.72, 655,173.21 and 121,261.23 is: 181,892.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,779.72 : 655,173.21 = 121,261.23 : x
  2. Step 2: Convert to fraction form
    436,779.72/655,173.21 = 121,261.23/x
  3. Step 3: Cross multiply
    436,779.72x = 655,173.21 × 121,261.23
  4. Step 4: Simplify right side
    436,779.72x = 79,447,109,307.65
  5. Step 5: Solve for x
    x = 79,447,109,307.65/436,779.72
  6. Step 6: Final answer
    x = 181,892.85

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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.