Home / 2,157.21-2,977-1,685.66

Finding the Fourth Proportional to 2,157.21, 2,977 and 1,685.66

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Solution

The fourth proportional to 2,157.21, 2,977 and 1,685.66 is: 2,326.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.21 : 2,977 = 1,685.66 : x
  2. Step 2: Convert to fraction form
    2,157.21/2,977 = 1,685.66/x
  3. Step 3: Cross multiply
    2,157.21x = 2,977 × 1,685.66
  4. Step 4: Simplify right side
    2,157.21x = 5,018,209.82
  5. Step 5: Solve for x
    x = 5,018,209.82/2,157.21
  6. Step 6: Final answer
    x = 2,326.25

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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.