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Finding the Fourth Proportional to 1,182.82, 1,632.36 and 783.79

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Solution

The fourth proportional to 1,182.82, 1,632.36 and 783.79 is: 1,081.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.82 : 1,632.36 = 783.79 : x
  2. Step 2: Convert to fraction form
    1,182.82/1,632.36 = 783.79/x
  3. Step 3: Cross multiply
    1,182.82x = 1,632.36 × 783.79
  4. Step 4: Simplify right side
    1,182.82x = 1,279,423.36
  5. Step 5: Solve for x
    x = 1,279,423.36/1,182.82
  6. Step 6: Final answer
    x = 1,081.67

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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.