Home / 1,638.39-2,459.70-1,020.15

Finding the Fourth Proportional to 1,638.39, 2,459.70 and 1,020.15

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Solution

The fourth proportional to 1,638.39, 2,459.70 and 1,020.15 is: 1,531.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.39 : 2,459.70 = 1,020.15 : x
  2. Step 2: Convert to fraction form
    1,638.39/2,459.70 = 1,020.15/x
  3. Step 3: Cross multiply
    1,638.39x = 2,459.70 × 1,020.15
  4. Step 4: Simplify right side
    1,638.39x = 2,509,262.96
  5. Step 5: Solve for x
    x = 2,509,262.96/1,638.39
  6. Step 6: Final answer
    x = 1,531.54

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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.