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Finding the Fourth Proportional to 279,748.49, 419,214.49 and 139,313.93

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Solution

The fourth proportional to 279,748.49, 419,214.49 and 139,313.93 is: 208,767.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,748.49 : 419,214.49 = 139,313.93 : x
  2. Step 2: Convert to fraction form
    279,748.49/419,214.49 = 139,313.93/x
  3. Step 3: Cross multiply
    279,748.49x = 419,214.49 × 139,313.93
  4. Step 4: Simplify right side
    279,748.49x = 58,402,418,114.85
  5. Step 5: Solve for x
    x = 58,402,418,114.85/279,748.49
  6. Step 6: Final answer
    x = 208,767.59

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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.