Home / 1,816.47-2,506.79-1,187.41

Finding the Fourth Proportional to 1,816.47, 2,506.79 and 1,187.41

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Solution

The fourth proportional to 1,816.47, 2,506.79 and 1,187.41 is: 1,638.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.47 : 2,506.79 = 1,187.41 : x
  2. Step 2: Convert to fraction form
    1,816.47/2,506.79 = 1,187.41/x
  3. Step 3: Cross multiply
    1,816.47x = 2,506.79 × 1,187.41
  4. Step 4: Simplify right side
    1,816.47x = 2,976,587.51
  5. Step 5: Solve for x
    x = 2,976,587.51/1,816.47
  6. Step 6: Final answer
    x = 1,638.67

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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.