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Finding the Third Proportional to 3,128.63 and 4,117.50

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Solution

The third proportional to 3,128.63 and 4,117.50 is: 5,418.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.63 : 4,117.50 = 4,117.50 : x
  2. Step 2: Convert to fraction form
    3,128.63/4,117.50 = 4,117.50/x
  3. Step 3: Cross multiply
    3,128.63x = 4,117.50 × 4,117.50
  4. Step 4: Simplify right side
    3,128.63x = 16,953,806.25
  5. Step 5: Solve for x
    x = 16,953,806.25/3,128.63
  6. Step 6: Final answer
    x = 5,418.93

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.