Home / 1,397.90-1,930.48-1,266.68

Finding the Fourth Proportional to 1,397.90, 1,930.48 and 1,266.68

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Solution

The fourth proportional to 1,397.90, 1,930.48 and 1,266.68 is: 1,749.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397.90 : 1,930.48 = 1,266.68 : x
  2. Step 2: Convert to fraction form
    1,397.90/1,930.48 = 1,266.68/x
  3. Step 3: Cross multiply
    1,397.90x = 1,930.48 × 1,266.68
  4. Step 4: Simplify right side
    1,397.90x = 2,445,300.41
  5. Step 5: Solve for x
    x = 2,445,300.41/1,397.90
  6. Step 6: Final answer
    x = 1,749.27

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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.