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Finding the Fourth Proportional to 1,745.76, 2,618.20 and 705.45

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Solution

The fourth proportional to 1,745.76, 2,618.20 and 705.45 is: 1,057.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,745.76 : 2,618.20 = 705.45 : x
  2. Step 2: Convert to fraction form
    1,745.76/2,618.20 = 705.45/x
  3. Step 3: Cross multiply
    1,745.76x = 2,618.20 × 705.45
  4. Step 4: Simplify right side
    1,745.76x = 1,847,001.19
  5. Step 5: Solve for x
    x = 1,847,001.19/1,745.76
  6. Step 6: Final answer
    x = 1,057.99

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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.