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Finding the Fourth Proportional to 1,873.74, 2,809.89 and 777.51

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Solution

The fourth proportional to 1,873.74, 2,809.89 and 777.51 is: 1,165.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,873.74 : 2,809.89 = 777.51 : x
  2. Step 2: Convert to fraction form
    1,873.74/2,809.89 = 777.51/x
  3. Step 3: Cross multiply
    1,873.74x = 2,809.89 × 777.51
  4. Step 4: Simplify right side
    1,873.74x = 2,184,717.57
  5. Step 5: Solve for x
    x = 2,184,717.57/1,873.74
  6. Step 6: Final answer
    x = 1,165.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.