Home / 1,555.51-2,143.64-1,112.64

Finding the Fourth Proportional to 1,555.51, 2,143.64 and 1,112.64

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Solution

The fourth proportional to 1,555.51, 2,143.64 and 1,112.64 is: 1,533.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.51 : 2,143.64 = 1,112.64 : x
  2. Step 2: Convert to fraction form
    1,555.51/2,143.64 = 1,112.64/x
  3. Step 3: Cross multiply
    1,555.51x = 2,143.64 × 1,112.64
  4. Step 4: Simplify right side
    1,555.51x = 2,385,100.46
  5. Step 5: Solve for x
    x = 2,385,100.46/1,555.51
  6. Step 6: Final answer
    x = 1,533.33

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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.