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Finding the Fourth Proportional to 1,765.02, 2,435.63 and 979.11

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Solution

The fourth proportional to 1,765.02, 2,435.63 and 979.11 is: 1,351.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.02 : 2,435.63 = 979.11 : x
  2. Step 2: Convert to fraction form
    1,765.02/2,435.63 = 979.11/x
  3. Step 3: Cross multiply
    1,765.02x = 2,435.63 × 979.11
  4. Step 4: Simplify right side
    1,765.02x = 2,384,749.69
  5. Step 5: Solve for x
    x = 2,384,749.69/1,765.02
  6. Step 6: Final answer
    x = 1,351.12

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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.