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Finding the Fourth Proportional to 436,859.16, 655,289 and 121,316.08

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Solution

The fourth proportional to 436,859.16, 655,289 and 121,316.08 is: 181,974.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,859.16 : 655,289 = 121,316.08 : x
  2. Step 2: Convert to fraction form
    436,859.16/655,289 = 121,316.08/x
  3. Step 3: Cross multiply
    436,859.16x = 655,289 × 121,316.08
  4. Step 4: Simplify right side
    436,859.16x = 79,497,092,747.12
  5. Step 5: Solve for x
    x = 79,497,092,747.12/436,859.16
  6. Step 6: Final answer
    x = 181,974.19

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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.