Home / 2,780.97-4,172.53-1,686.12

Finding the Fourth Proportional to 2,780.97, 4,172.53 and 1,686.12

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Solution

The fourth proportional to 2,780.97, 4,172.53 and 1,686.12 is: 2,529.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.97 : 4,172.53 = 1,686.12 : x
  2. Step 2: Convert to fraction form
    2,780.97/4,172.53 = 1,686.12/x
  3. Step 3: Cross multiply
    2,780.97x = 4,172.53 × 1,686.12
  4. Step 4: Simplify right side
    2,780.97x = 7,035,386.28
  5. Step 5: Solve for x
    x = 7,035,386.28/2,780.97
  6. Step 6: Final answer
    x = 2,529.83

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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.