Home / 1,931.36-2,664.48-1,145.12

Finding the Fourth Proportional to 1,931.36, 2,664.48 and 1,145.12

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Solution

The fourth proportional to 1,931.36, 2,664.48 and 1,145.12 is: 1,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.36 : 2,664.48 = 1,145.12 : x
  2. Step 2: Convert to fraction form
    1,931.36/2,664.48 = 1,145.12/x
  3. Step 3: Cross multiply
    1,931.36x = 2,664.48 × 1,145.12
  4. Step 4: Simplify right side
    1,931.36x = 3,051,149.34
  5. Step 5: Solve for x
    x = 3,051,149.34/1,931.36
  6. Step 6: Final answer
    x = 1,579.79

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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.