Home / 1,555.34-2,145.84-1,057.12

Finding the Fourth Proportional to 1,555.34, 2,145.84 and 1,057.12

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Solution

The fourth proportional to 1,555.34, 2,145.84 and 1,057.12 is: 1,458.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.34 : 2,145.84 = 1,057.12 : x
  2. Step 2: Convert to fraction form
    1,555.34/2,145.84 = 1,057.12/x
  3. Step 3: Cross multiply
    1,555.34x = 2,145.84 × 1,057.12
  4. Step 4: Simplify right side
    1,555.34x = 2,268,410.38
  5. Step 5: Solve for x
    x = 2,268,410.38/1,555.34
  6. Step 6: Final answer
    x = 1,458.47

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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.