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Finding the Fourth Proportional to 1,440.29, 1,986.93 and 936.11

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Solution

The fourth proportional to 1,440.29, 1,986.93 and 936.11 is: 1,291.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.29 : 1,986.93 = 936.11 : x
  2. Step 2: Convert to fraction form
    1,440.29/1,986.93 = 936.11/x
  3. Step 3: Cross multiply
    1,440.29x = 1,986.93 × 936.11
  4. Step 4: Simplify right side
    1,440.29x = 1,859,987.22
  5. Step 5: Solve for x
    x = 1,859,987.22/1,440.29
  6. Step 6: Final answer
    x = 1,291.39

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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.