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Finding the Fourth Proportional to 1,775.74, 2,450.54 and 979.09

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Solution

The fourth proportional to 1,775.74, 2,450.54 and 979.09 is: 1,351.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,775.74 : 2,450.54 = 979.09 : x
  2. Step 2: Convert to fraction form
    1,775.74/2,450.54 = 979.09/x
  3. Step 3: Cross multiply
    1,775.74x = 2,450.54 × 979.09
  4. Step 4: Simplify right side
    1,775.74x = 2,399,302.89
  5. Step 5: Solve for x
    x = 2,399,302.89/1,775.74
  6. Step 6: Final answer
    x = 1,351.16

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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.