Home / 1,057.11-1,460.21-811.47

Finding the Fourth Proportional to 1,057.11, 1,460.21 and 811.47

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Solution

The fourth proportional to 1,057.11, 1,460.21 and 811.47 is: 1,120.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.11 : 1,460.21 = 811.47 : x
  2. Step 2: Convert to fraction form
    1,057.11/1,460.21 = 811.47/x
  3. Step 3: Cross multiply
    1,057.11x = 1,460.21 × 811.47
  4. Step 4: Simplify right side
    1,057.11x = 1,184,906.26
  5. Step 5: Solve for x
    x = 1,184,906.26/1,057.11
  6. Step 6: Final answer
    x = 1,120.89

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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.