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Finding the Fourth Proportional to 1,610.89, 2,415.62 and 745.20

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Solution

The fourth proportional to 1,610.89, 2,415.62 and 745.20 is: 1,117.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.89 : 2,415.62 = 745.20 : x
  2. Step 2: Convert to fraction form
    1,610.89/2,415.62 = 745.20/x
  3. Step 3: Cross multiply
    1,610.89x = 2,415.62 × 745.20
  4. Step 4: Simplify right side
    1,610.89x = 1,800,121.89
  5. Step 5: Solve for x
    x = 1,800,121.89/1,610.89
  6. Step 6: Final answer
    x = 1,117.47

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1.5x scale

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.