Home / 1,215.04-1,822.16-393.12

Finding the Fourth Proportional to 1,215.04, 1,822.16 and 393.12

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Solution

The fourth proportional to 1,215.04, 1,822.16 and 393.12 is: 589.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.04 : 1,822.16 = 393.12 : x
  2. Step 2: Convert to fraction form
    1,215.04/1,822.16 = 393.12/x
  3. Step 3: Cross multiply
    1,215.04x = 1,822.16 × 393.12
  4. Step 4: Simplify right side
    1,215.04x = 716,327.54
  5. Step 5: Solve for x
    x = 716,327.54/1,215.04
  6. Step 6: Final answer
    x = 589.55

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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.