Home / 1,326.21-1,988.19-838.17

Finding the Fourth Proportional to 1,326.21, 1,988.19 and 838.17

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Solution

The fourth proportional to 1,326.21, 1,988.19 and 838.17 is: 1,256.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.21 : 1,988.19 = 838.17 : x
  2. Step 2: Convert to fraction form
    1,326.21/1,988.19 = 838.17/x
  3. Step 3: Cross multiply
    1,326.21x = 1,988.19 × 838.17
  4. Step 4: Simplify right side
    1,326.21x = 1,666,441.21
  5. Step 5: Solve for x
    x = 1,666,441.21/1,326.21
  6. Step 6: Final answer
    x = 1,256.54

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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.