Home / 1,571.81-2,354.40-1,261.98

Finding the Fourth Proportional to 1,571.81, 2,354.40 and 1,261.98

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Solution

The fourth proportional to 1,571.81, 2,354.40 and 1,261.98 is: 1,890.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.81 : 2,354.40 = 1,261.98 : x
  2. Step 2: Convert to fraction form
    1,571.81/2,354.40 = 1,261.98/x
  3. Step 3: Cross multiply
    1,571.81x = 2,354.40 × 1,261.98
  4. Step 4: Simplify right side
    1,571.81x = 2,971,205.71
  5. Step 5: Solve for x
    x = 2,971,205.71/1,571.81
  6. Step 6: Final answer
    x = 1,890.31

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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.