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Finding the Fourth Proportional to 1,334.70, 1,841.78 and 745.20

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Solution

The fourth proportional to 1,334.70, 1,841.78 and 745.20 is: 1,028.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.70 : 1,841.78 = 745.20 : x
  2. Step 2: Convert to fraction form
    1,334.70/1,841.78 = 745.20/x
  3. Step 3: Cross multiply
    1,334.70x = 1,841.78 × 745.20
  4. Step 4: Simplify right side
    1,334.70x = 1,372,494.46
  5. Step 5: Solve for x
    x = 1,372,494.46/1,334.70
  6. Step 6: Final answer
    x = 1,028.32

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1.5x scale

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.