Home / 1,885.51-2,823.06-1,421.89

Finding the Fourth Proportional to 1,885.51, 2,823.06 and 1,421.89

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Solution

The fourth proportional to 1,885.51, 2,823.06 and 1,421.89 is: 2,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.51 : 2,823.06 = 1,421.89 : x
  2. Step 2: Convert to fraction form
    1,885.51/2,823.06 = 1,421.89/x
  3. Step 3: Cross multiply
    1,885.51x = 2,823.06 × 1,421.89
  4. Step 4: Simplify right side
    1,885.51x = 4,014,080.78
  5. Step 5: Solve for x
    x = 4,014,080.78/1,885.51
  6. Step 6: Final answer
    x = 2,128.91

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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.