Home / 1,215.56-1,823.36-485.12

Finding the Fourth Proportional to 1,215.56, 1,823.36 and 485.12

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Solution

The fourth proportional to 1,215.56, 1,823.36 and 485.12 is: 727.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.56 : 1,823.36 = 485.12 : x
  2. Step 2: Convert to fraction form
    1,215.56/1,823.36 = 485.12/x
  3. Step 3: Cross multiply
    1,215.56x = 1,823.36 × 485.12
  4. Step 4: Simplify right side
    1,215.56x = 884,536.86
  5. Step 5: Solve for x
    x = 884,536.86/1,215.56
  6. Step 6: Final answer
    x = 727.68

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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.