Home / 1,457.82-2,011.47-985.79

Finding the Fourth Proportional to 1,457.82, 2,011.47 and 985.79

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Solution

The fourth proportional to 1,457.82, 2,011.47 and 985.79 is: 1,360.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.82 : 2,011.47 = 985.79 : x
  2. Step 2: Convert to fraction form
    1,457.82/2,011.47 = 985.79/x
  3. Step 3: Cross multiply
    1,457.82x = 2,011.47 × 985.79
  4. Step 4: Simplify right side
    1,457.82x = 1,982,876.95
  5. Step 5: Solve for x
    x = 1,982,876.95/1,457.82
  6. Step 6: Final answer
    x = 1,360.17

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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.