Home / 1,217.34-1,676.25-1,020.51

Finding the Fourth Proportional to 1,217.34, 1,676.25 and 1,020.51

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Solution

The fourth proportional to 1,217.34, 1,676.25 and 1,020.51 is: 1,405.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.34 : 1,676.25 = 1,020.51 : x
  2. Step 2: Convert to fraction form
    1,217.34/1,676.25 = 1,020.51/x
  3. Step 3: Cross multiply
    1,217.34x = 1,676.25 × 1,020.51
  4. Step 4: Simplify right side
    1,217.34x = 1,710,629.89
  5. Step 5: Solve for x
    x = 1,710,629.89/1,217.34
  6. Step 6: Final answer
    x = 1,405.22

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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.