Home / 1,415.33-1,948.80-1,257.69

Finding the Fourth Proportional to 1,415.33, 1,948.80 and 1,257.69

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Solution

The fourth proportional to 1,415.33, 1,948.80 and 1,257.69 is: 1,731.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.33 : 1,948.80 = 1,257.69 : x
  2. Step 2: Convert to fraction form
    1,415.33/1,948.80 = 1,257.69/x
  3. Step 3: Cross multiply
    1,415.33x = 1,948.80 × 1,257.69
  4. Step 4: Simplify right side
    1,415.33x = 2,450,986.27
  5. Step 5: Solve for x
    x = 2,450,986.27/1,415.33
  6. Step 6: Final answer
    x = 1,731.74

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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.