Home / 1,317.40-1,819.22-1,057.32

Finding the Fourth Proportional to 1,317.40, 1,819.22 and 1,057.32

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Solution

The fourth proportional to 1,317.40, 1,819.22 and 1,057.32 is: 1,460.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.40 : 1,819.22 = 1,057.32 : x
  2. Step 2: Convert to fraction form
    1,317.40/1,819.22 = 1,057.32/x
  3. Step 3: Cross multiply
    1,317.40x = 1,819.22 × 1,057.32
  4. Step 4: Simplify right side
    1,317.40x = 1,923,497.69
  5. Step 5: Solve for x
    x = 1,923,497.69/1,317.40
  6. Step 6: Final answer
    x = 1,460.07

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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.