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Finding the Fourth Proportional to 515,763.72, 773,643.42 and 291,021.84

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Solution

The fourth proportional to 515,763.72, 773,643.42 and 291,021.84 is: 436,531.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,763.72 : 773,643.42 = 291,021.84 : x
  2. Step 2: Convert to fraction form
    515,763.72/773,643.42 = 291,021.84/x
  3. Step 3: Cross multiply
    515,763.72x = 773,643.42 × 291,021.84
  4. Step 4: Simplify right side
    515,763.72x = 225,147,131,592.29
  5. Step 5: Solve for x
    x = 225,147,131,592.29/515,763.72
  6. Step 6: Final answer
    x = 436,531.54

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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.