Home / 1,685.21-2,529.23-864.27

Finding the Fourth Proportional to 1,685.21, 2,529.23 and 864.27

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Solution

The fourth proportional to 1,685.21, 2,529.23 and 864.27 is: 1,297.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.21 : 2,529.23 = 864.27 : x
  2. Step 2: Convert to fraction form
    1,685.21/2,529.23 = 864.27/x
  3. Step 3: Cross multiply
    1,685.21x = 2,529.23 × 864.27
  4. Step 4: Simplify right side
    1,685.21x = 2,185,933.29
  5. Step 5: Solve for x
    x = 2,185,933.29/1,685.21
  6. Step 6: Final answer
    x = 1,297.13

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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.