Home / 1,571.85-2,170.53-983.39

Finding the Fourth Proportional to 1,571.85, 2,170.53 and 983.39

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Solution

The fourth proportional to 1,571.85, 2,170.53 and 983.39 is: 1,357.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.85 : 2,170.53 = 983.39 : x
  2. Step 2: Convert to fraction form
    1,571.85/2,170.53 = 983.39/x
  3. Step 3: Cross multiply
    1,571.85x = 2,170.53 × 983.39
  4. Step 4: Simplify right side
    1,571.85x = 2,134,466.64
  5. Step 5: Solve for x
    x = 2,134,466.64/1,571.85
  6. Step 6: Final answer
    x = 1,357.93

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Double scale
Find fourth proportional to 1,572.85, 2,171.91 and 984.39
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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.