Home / 2,106.71-2,907.29-1,175.21

Finding the Fourth Proportional to 2,106.71, 2,907.29 and 1,175.21

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Solution

The fourth proportional to 2,106.71, 2,907.29 and 1,175.21 is: 1,621.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.71 : 2,907.29 = 1,175.21 : x
  2. Step 2: Convert to fraction form
    2,106.71/2,907.29 = 1,175.21/x
  3. Step 3: Cross multiply
    2,106.71x = 2,907.29 × 1,175.21
  4. Step 4: Simplify right side
    2,106.71x = 3,416,670.40
  5. Step 5: Solve for x
    x = 3,416,670.40/2,106.71
  6. Step 6: Final answer
    x = 1,621.80

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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.