Home / 1,317.09-1,819.65-1,003.42

Finding the Fourth Proportional to 1,317.09, 1,819.65 and 1,003.42

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Solution

The fourth proportional to 1,317.09, 1,819.65 and 1,003.42 is: 1,386.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.09 : 1,819.65 = 1,003.42 : x
  2. Step 2: Convert to fraction form
    1,317.09/1,819.65 = 1,003.42/x
  3. Step 3: Cross multiply
    1,317.09x = 1,819.65 × 1,003.42
  4. Step 4: Simplify right side
    1,317.09x = 1,825,873.20
  5. Step 5: Solve for x
    x = 1,825,873.20/1,317.09
  6. Step 6: Final answer
    x = 1,386.29

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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.