Home / 1,537.89-2,121.48-1,040.70

Finding the Fourth Proportional to 1,537.89, 2,121.48 and 1,040.70

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Solution

The fourth proportional to 1,537.89, 2,121.48 and 1,040.70 is: 1,435.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.89 : 2,121.48 = 1,040.70 : x
  2. Step 2: Convert to fraction form
    1,537.89/2,121.48 = 1,040.70/x
  3. Step 3: Cross multiply
    1,537.89x = 2,121.48 × 1,040.70
  4. Step 4: Simplify right side
    1,537.89x = 2,207,824.24
  5. Step 5: Solve for x
    x = 2,207,824.24/1,537.89
  6. Step 6: Final answer
    x = 1,435.62

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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.