Home / 1,555.03-2,148.78-1,181.35

Finding the Fourth Proportional to 1,555.03, 2,148.78 and 1,181.35

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Solution

The fourth proportional to 1,555.03, 2,148.78 and 1,181.35 is: 1,632.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.03 : 2,148.78 = 1,181.35 : x
  2. Step 2: Convert to fraction form
    1,555.03/2,148.78 = 1,181.35/x
  3. Step 3: Cross multiply
    1,555.03x = 2,148.78 × 1,181.35
  4. Step 4: Simplify right side
    1,555.03x = 2,538,461.25
  5. Step 5: Solve for x
    x = 2,538,461.25/1,555.03
  6. Step 6: Final answer
    x = 1,632.42

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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.