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Finding the Fourth Proportional to 1,441.93, 1,989.84 and 812.51

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Solution

The fourth proportional to 1,441.93, 1,989.84 and 812.51 is: 1,121.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.93 : 1,989.84 = 812.51 : x
  2. Step 2: Convert to fraction form
    1,441.93/1,989.84 = 812.51/x
  3. Step 3: Cross multiply
    1,441.93x = 1,989.84 × 812.51
  4. Step 4: Simplify right side
    1,441.93x = 1,616,774.37
  5. Step 5: Solve for x
    x = 1,616,774.37/1,441.93
  6. Step 6: Final answer
    x = 1,121.26

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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.