Home / 3,818.79-5,728.08-1,221.69

Finding the Fourth Proportional to 3,818.79, 5,728.08 and 1,221.69

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Solution

The fourth proportional to 3,818.79, 5,728.08 and 1,221.69 is: 1,832.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,818.79 : 5,728.08 = 1,221.69 : x
  2. Step 2: Convert to fraction form
    3,818.79/5,728.08 = 1,221.69/x
  3. Step 3: Cross multiply
    3,818.79x = 5,728.08 × 1,221.69
  4. Step 4: Simplify right side
    3,818.79x = 6,997,938.06
  5. Step 5: Solve for x
    x = 6,997,938.06/3,818.79
  6. Step 6: Final answer
    x = 1,832.50

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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.