Home / 1,913.85-2,638.67-1,647.72

Finding the Fourth Proportional to 1,913.85, 2,638.67 and 1,647.72

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Solution

The fourth proportional to 1,913.85, 2,638.67 and 1,647.72 is: 2,271.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.85 : 2,638.67 = 1,647.72 : x
  2. Step 2: Convert to fraction form
    1,913.85/2,638.67 = 1,647.72/x
  3. Step 3: Cross multiply
    1,913.85x = 2,638.67 × 1,647.72
  4. Step 4: Simplify right side
    1,913.85x = 4,347,781.09
  5. Step 5: Solve for x
    x = 4,347,781.09/1,913.85
  6. Step 6: Final answer
    x = 2,271.75

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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.