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Finding the Fourth Proportional to 1,989.39, 2,984.07 and 835.14

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Solution

The fourth proportional to 1,989.39, 2,984.07 and 835.14 is: 1,252.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.39 : 2,984.07 = 835.14 : x
  2. Step 2: Convert to fraction form
    1,989.39/2,984.07 = 835.14/x
  3. Step 3: Cross multiply
    1,989.39x = 2,984.07 × 835.14
  4. Step 4: Simplify right side
    1,989.39x = 2,492,116.22
  5. Step 5: Solve for x
    x = 2,492,116.22/1,989.39
  6. Step 6: Final answer
    x = 1,252.70

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Double scale
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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.