Home / 3,872.90-5,810.21-1,275.66

Finding the Fourth Proportional to 3,872.90, 5,810.21 and 1,275.66

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Solution

The fourth proportional to 3,872.90, 5,810.21 and 1,275.66 is: 1,913.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.90 : 5,810.21 = 1,275.66 : x
  2. Step 2: Convert to fraction form
    3,872.90/5,810.21 = 1,275.66/x
  3. Step 3: Cross multiply
    3,872.90x = 5,810.21 × 1,275.66
  4. Step 4: Simplify right side
    3,872.90x = 7,411,852.49
  5. Step 5: Solve for x
    x = 7,411,852.49/3,872.90
  6. Step 6: Final answer
    x = 1,913.77

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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.