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Finding the Fourth Proportional to 1,406.51, 2,109.77 and 936.99

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Solution

The fourth proportional to 1,406.51, 2,109.77 and 936.99 is: 1,405.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.51 : 2,109.77 = 936.99 : x
  2. Step 2: Convert to fraction form
    1,406.51/2,109.77 = 936.99/x
  3. Step 3: Cross multiply
    1,406.51x = 2,109.77 × 936.99
  4. Step 4: Simplify right side
    1,406.51x = 1,976,840.79
  5. Step 5: Solve for x
    x = 1,976,840.79/1,406.51
  6. Step 6: Final answer
    x = 1,405.49

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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.