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Finding the Fourth Proportional to 279,319.56, 385,469.72 and 158,465.94

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Solution

The fourth proportional to 279,319.56, 385,469.72 and 158,465.94 is: 218,687.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,319.56 : 385,469.72 = 158,465.94 : x
  2. Step 2: Convert to fraction form
    279,319.56/385,469.72 = 158,465.94/x
  3. Step 3: Cross multiply
    279,319.56x = 385,469.72 × 158,465.94
  4. Step 4: Simplify right side
    279,319.56x = 61,083,821,521.34
  5. Step 5: Solve for x
    x = 61,083,821,521.34/279,319.56
  6. Step 6: Final answer
    x = 218,687.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.