Home / 1,216.59-1,824.84-485.66

Finding the Fourth Proportional to 1,216.59, 1,824.84 and 485.66

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Solution

The fourth proportional to 1,216.59, 1,824.84 and 485.66 is: 728.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.59 : 1,824.84 = 485.66 : x
  2. Step 2: Convert to fraction form
    1,216.59/1,824.84 = 485.66/x
  3. Step 3: Cross multiply
    1,216.59x = 1,824.84 × 485.66
  4. Step 4: Simplify right side
    1,216.59x = 886,242.67
  5. Step 5: Solve for x
    x = 886,242.67/1,216.59
  6. Step 6: Final answer
    x = 728.46

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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.