Home / 1,290.44-1,779.51-1,148.20

Finding the Fourth Proportional to 1,290.44, 1,779.51 and 1,148.20

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Solution

The fourth proportional to 1,290.44, 1,779.51 and 1,148.20 is: 1,583.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.44 : 1,779.51 = 1,148.20 : x
  2. Step 2: Convert to fraction form
    1,290.44/1,779.51 = 1,148.20/x
  3. Step 3: Cross multiply
    1,290.44x = 1,779.51 × 1,148.20
  4. Step 4: Simplify right side
    1,290.44x = 2,043,233.38
  5. Step 5: Solve for x
    x = 2,043,233.38/1,290.44
  6. Step 6: Final answer
    x = 1,583.36

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Double scale
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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.