Home / 1,871-2,582.79-1,172.78

Finding the Fourth Proportional to 1,871, 2,582.79 and 1,172.78

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Solution

The fourth proportional to 1,871, 2,582.79 and 1,172.78 is: 1,618.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871 : 2,582.79 = 1,172.78 : x
  2. Step 2: Convert to fraction form
    1,871/2,582.79 = 1,172.78/x
  3. Step 3: Cross multiply
    1,871x = 2,582.79 × 1,172.78
  4. Step 4: Simplify right side
    1,871x = 3,029,044.46
  5. Step 5: Solve for x
    x = 3,029,044.46/1,871
  6. Step 6: Final answer
    x = 1,618.94

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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.