Home / 1,537.17-2,121.29-838.54

Finding the Fourth Proportional to 1,537.17, 2,121.29 and 838.54

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Solution

The fourth proportional to 1,537.17, 2,121.29 and 838.54 is: 1,157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.17 : 2,121.29 = 838.54 : x
  2. Step 2: Convert to fraction form
    1,537.17/2,121.29 = 838.54/x
  3. Step 3: Cross multiply
    1,537.17x = 2,121.29 × 838.54
  4. Step 4: Simplify right side
    1,537.17x = 1,778,782.32
  5. Step 5: Solve for x
    x = 1,778,782.32/1,537.17
  6. Step 6: Final answer
    x = 1,157.18

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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.