Home / 1,555.11-2,148.86-1,112.24

Finding the Fourth Proportional to 1,555.11, 2,148.86 and 1,112.24

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Solution

The fourth proportional to 1,555.11, 2,148.86 and 1,112.24 is: 1,536.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.11 : 2,148.86 = 1,112.24 : x
  2. Step 2: Convert to fraction form
    1,555.11/2,148.86 = 1,112.24/x
  3. Step 3: Cross multiply
    1,555.11x = 2,148.86 × 1,112.24
  4. Step 4: Simplify right side
    1,555.11x = 2,390,056.20
  5. Step 5: Solve for x
    x = 2,390,056.20/1,555.11
  6. Step 6: Final answer
    x = 1,536.90

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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.