Home / 1,536.79-2,117.07-1,221.96

Finding the Fourth Proportional to 1,536.79, 2,117.07 and 1,221.96

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Solution

The fourth proportional to 1,536.79, 2,117.07 and 1,221.96 is: 1,683.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.79 : 2,117.07 = 1,221.96 : x
  2. Step 2: Convert to fraction form
    1,536.79/2,117.07 = 1,221.96/x
  3. Step 3: Cross multiply
    1,536.79x = 2,117.07 × 1,221.96
  4. Step 4: Simplify right side
    1,536.79x = 2,586,958.16
  5. Step 5: Solve for x
    x = 2,586,958.16/1,536.79
  6. Step 6: Final answer
    x = 1,683.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.