Home / 1,421.42-2,133.75-845.51

Finding the Fourth Proportional to 1,421.42, 2,133.75 and 845.51

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Solution

The fourth proportional to 1,421.42, 2,133.75 and 845.51 is: 1,269.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.42 : 2,133.75 = 845.51 : x
  2. Step 2: Convert to fraction form
    1,421.42/2,133.75 = 845.51/x
  3. Step 3: Cross multiply
    1,421.42x = 2,133.75 × 845.51
  4. Step 4: Simplify right side
    1,421.42x = 1,804,106.96
  5. Step 5: Solve for x
    x = 1,804,106.96/1,421.42
  6. Step 6: Final answer
    x = 1,269.23

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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.