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Finding the Fourth Proportional to 3,175, 4,381.56 and 1,777.72

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Solution

The fourth proportional to 3,175, 4,381.56 and 1,777.72 is: 2,453.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,175 : 4,381.56 = 1,777.72 : x
  2. Step 2: Convert to fraction form
    3,175/4,381.56 = 1,777.72/x
  3. Step 3: Cross multiply
    3,175x = 4,381.56 × 1,777.72
  4. Step 4: Simplify right side
    3,175x = 7,789,186.84
  5. Step 5: Solve for x
    x = 7,789,186.84/3,175
  6. Step 6: Final answer
    x = 2,453.29

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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.