Home / 1,816.87-2,506.35-1,187.77

Finding the Fourth Proportional to 1,816.87, 2,506.35 and 1,187.77

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Solution

The fourth proportional to 1,816.87, 2,506.35 and 1,187.77 is: 1,638.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.87 : 2,506.35 = 1,187.77 : x
  2. Step 2: Convert to fraction form
    1,816.87/2,506.35 = 1,187.77/x
  3. Step 3: Cross multiply
    1,816.87x = 2,506.35 × 1,187.77
  4. Step 4: Simplify right side
    1,816.87x = 2,976,967.34
  5. Step 5: Solve for x
    x = 2,976,967.34/1,816.87
  6. Step 6: Final answer
    x = 1,638.51

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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.