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Finding the Fourth Proportional to 279,267.40, 418,868.70 and 79,618.60

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Solution

The fourth proportional to 279,267.40, 418,868.70 and 79,618.60 is: 119,418.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,267.40 : 418,868.70 = 79,618.60 : x
  2. Step 2: Convert to fraction form
    279,267.40/418,868.70 = 79,618.60/x
  3. Step 3: Cross multiply
    279,267.40x = 418,868.70 × 79,618.60
  4. Step 4: Simplify right side
    279,267.40x = 33,349,739,477.82
  5. Step 5: Solve for x
    x = 33,349,739,477.82/279,267.40
  6. Step 6: Final answer
    x = 119,418.66

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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.