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Finding the Fourth Proportional to 2,065.22, 3,098.15 and 678.23

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Solution

The fourth proportional to 2,065.22, 3,098.15 and 678.23 is: 1,017.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,065.22 : 3,098.15 = 678.23 : x
  2. Step 2: Convert to fraction form
    2,065.22/3,098.15 = 678.23/x
  3. Step 3: Cross multiply
    2,065.22x = 3,098.15 × 678.23
  4. Step 4: Simplify right side
    2,065.22x = 2,101,262.63
  5. Step 5: Solve for x
    x = 2,101,262.63/2,065.22
  6. Step 6: Final answer
    x = 1,017.45

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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.