Home / 3,172.90-4,378.72-1,775.64

Finding the Fourth Proportional to 3,172.90, 4,378.72 and 1,775.64

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Solution

The fourth proportional to 3,172.90, 4,378.72 and 1,775.64 is: 2,450.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.90 : 4,378.72 = 1,775.64 : x
  2. Step 2: Convert to fraction form
    3,172.90/4,378.72 = 1,775.64/x
  3. Step 3: Cross multiply
    3,172.90x = 4,378.72 × 1,775.64
  4. Step 4: Simplify right side
    3,172.90x = 7,775,030.38
  5. Step 5: Solve for x
    x = 7,775,030.38/3,172.90
  6. Step 6: Final answer
    x = 2,450.45

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1.5x scale

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.