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Finding the Fourth Proportional to 1,319.06, 1,819.79 and 847.24

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Solution

The fourth proportional to 1,319.06, 1,819.79 and 847.24 is: 1,168.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.06 : 1,819.79 = 847.24 : x
  2. Step 2: Convert to fraction form
    1,319.06/1,819.79 = 847.24/x
  3. Step 3: Cross multiply
    1,319.06x = 1,819.79 × 847.24
  4. Step 4: Simplify right side
    1,319.06x = 1,541,798.88
  5. Step 5: Solve for x
    x = 1,541,798.88/1,319.06
  6. Step 6: Final answer
    x = 1,168.86

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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.