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Finding the Fourth Proportional to 1,305.06, 1,798.88 and 1,020.98

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Solution

The fourth proportional to 1,305.06, 1,798.88 and 1,020.98 is: 1,407.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.06 : 1,798.88 = 1,020.98 : x
  2. Step 2: Convert to fraction form
    1,305.06/1,798.88 = 1,020.98/x
  3. Step 3: Cross multiply
    1,305.06x = 1,798.88 × 1,020.98
  4. Step 4: Simplify right side
    1,305.06x = 1,836,620.50
  5. Step 5: Solve for x
    x = 1,836,620.50/1,305.06
  6. Step 6: Final answer
    x = 1,407.31

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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.