Home / 1,216.35-1,824.51-485.91

Finding the Fourth Proportional to 1,216.35, 1,824.51 and 485.91

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Solution

The fourth proportional to 1,216.35, 1,824.51 and 485.91 is: 728.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.35 : 1,824.51 = 485.91 : x
  2. Step 2: Convert to fraction form
    1,216.35/1,824.51 = 485.91/x
  3. Step 3: Cross multiply
    1,216.35x = 1,824.51 × 485.91
  4. Step 4: Simplify right side
    1,216.35x = 886,547.65
  5. Step 5: Solve for x
    x = 886,547.65/1,216.35
  6. Step 6: Final answer
    x = 728.86

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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.