Home / 2,685.21-3,706.40-1,888.79

Finding the Fourth Proportional to 2,685.21, 3,706.40 and 1,888.79

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Solution

The fourth proportional to 2,685.21, 3,706.40 and 1,888.79 is: 2,607.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.21 : 3,706.40 = 1,888.79 : x
  2. Step 2: Convert to fraction form
    2,685.21/3,706.40 = 1,888.79/x
  3. Step 3: Cross multiply
    2,685.21x = 3,706.40 × 1,888.79
  4. Step 4: Simplify right side
    2,685.21x = 7,000,583.28
  5. Step 5: Solve for x
    x = 7,000,583.28/2,685.21
  6. Step 6: Final answer
    x = 2,607.09

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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.