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Finding the Fourth Proportional to 1,770.60, 2,443.56 and 984.60

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Solution

The fourth proportional to 1,770.60, 2,443.56 and 984.60 is: 1,358.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,770.60 : 2,443.56 = 984.60 : x
  2. Step 2: Convert to fraction form
    1,770.60/2,443.56 = 984.60/x
  3. Step 3: Cross multiply
    1,770.60x = 2,443.56 × 984.60
  4. Step 4: Simplify right side
    1,770.60x = 2,405,929.18
  5. Step 5: Solve for x
    x = 2,405,929.18/1,770.60
  6. Step 6: Final answer
    x = 1,358.82

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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.