Home / 1,390.17-2,091.93-1,145.14

Finding the Fourth Proportional to 1,390.17, 2,091.93 and 1,145.14

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Solution

The fourth proportional to 1,390.17, 2,091.93 and 1,145.14 is: 1,723.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.17 : 2,091.93 = 1,145.14 : x
  2. Step 2: Convert to fraction form
    1,390.17/2,091.93 = 1,145.14/x
  3. Step 3: Cross multiply
    1,390.17x = 2,091.93 × 1,145.14
  4. Step 4: Simplify right side
    1,390.17x = 2,395,552.72
  5. Step 5: Solve for x
    x = 2,395,552.72/1,390.17
  6. Step 6: Final answer
    x = 1,723.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.