Home / 1,765.39-2,436.21-979.48

Finding the Fourth Proportional to 1,765.39, 2,436.21 and 979.48

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Solution

The fourth proportional to 1,765.39, 2,436.21 and 979.48 is: 1,351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.39 : 2,436.21 = 979.48 : x
  2. Step 2: Convert to fraction form
    1,765.39/2,436.21 = 979.48/x
  3. Step 3: Cross multiply
    1,765.39x = 2,436.21 × 979.48
  4. Step 4: Simplify right side
    1,765.39x = 2,386,218.97
  5. Step 5: Solve for x
    x = 2,386,218.97/1,765.39
  6. Step 6: Final answer
    x = 1,351.67

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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.