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Finding the Fourth Proportional to 279,047.85, 418,360.99 and 143,967.21

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Solution

The fourth proportional to 279,047.85, 418,360.99 and 143,967.21 is: 215,842.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,047.85 : 418,360.99 = 143,967.21 : x
  2. Step 2: Convert to fraction form
    279,047.85/418,360.99 = 143,967.21/x
  3. Step 3: Cross multiply
    279,047.85x = 418,360.99 × 143,967.21
  4. Step 4: Simplify right side
    279,047.85x = 60,230,264,503.14
  5. Step 5: Solve for x
    x = 60,230,264,503.14/279,047.85
  6. Step 6: Final answer
    x = 215,842.07

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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.