Home / 1,215.71-1,821.97-557.34

Finding the Fourth Proportional to 1,215.71, 1,821.97 and 557.34

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Solution

The fourth proportional to 1,215.71, 1,821.97 and 557.34 is: 835.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.71 : 1,821.97 = 557.34 : x
  2. Step 2: Convert to fraction form
    1,215.71/1,821.97 = 557.34/x
  3. Step 3: Cross multiply
    1,215.71x = 1,821.97 × 557.34
  4. Step 4: Simplify right side
    1,215.71x = 1,015,453.97
  5. Step 5: Solve for x
    x = 1,015,453.97/1,215.71
  6. Step 6: Final answer
    x = 835.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.