Home / 1,440.57-2,145.81-1,421.44

Finding the Fourth Proportional to 1,440.57, 2,145.81 and 1,421.44

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Solution

The fourth proportional to 1,440.57, 2,145.81 and 1,421.44 is: 2,117.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.57 : 2,145.81 = 1,421.44 : x
  2. Step 2: Convert to fraction form
    1,440.57/2,145.81 = 1,421.44/x
  3. Step 3: Cross multiply
    1,440.57x = 2,145.81 × 1,421.44
  4. Step 4: Simplify right side
    1,440.57x = 3,050,122.33
  5. Step 5: Solve for x
    x = 3,050,122.33/1,440.57
  6. Step 6: Final answer
    x = 2,117.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.