Home / 5,148.95-7,720.49-1,638.28

Finding the Fourth Proportional to 5,148.95, 7,720.49 and 1,638.28

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Solution

The fourth proportional to 5,148.95, 7,720.49 and 1,638.28 is: 2,456.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.95 : 7,720.49 = 1,638.28 : x
  2. Step 2: Convert to fraction form
    5,148.95/7,720.49 = 1,638.28/x
  3. Step 3: Cross multiply
    5,148.95x = 7,720.49 × 1,638.28
  4. Step 4: Simplify right side
    5,148.95x = 12,648,309.15
  5. Step 5: Solve for x
    x = 12,648,309.15/5,148.95
  6. Step 6: Final answer
    x = 2,456.48

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1.5x scale

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.