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Finding the Fourth Proportional to 1,410.09, 2,116.01 and 679.74

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Solution

The fourth proportional to 1,410.09, 2,116.01 and 679.74 is: 1,020.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.09 : 2,116.01 = 679.74 : x
  2. Step 2: Convert to fraction form
    1,410.09/2,116.01 = 679.74/x
  3. Step 3: Cross multiply
    1,410.09x = 2,116.01 × 679.74
  4. Step 4: Simplify right side
    1,410.09x = 1,438,336.64
  5. Step 5: Solve for x
    x = 1,438,336.64/1,410.09
  6. Step 6: Final answer
    x = 1,020.03

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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.