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Finding the Fourth Proportional to 2,175.79, 3,261.37 and 714.55

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Solution

The fourth proportional to 2,175.79, 3,261.37 and 714.55 is: 1,071.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.79 : 3,261.37 = 714.55 : x
  2. Step 2: Convert to fraction form
    2,175.79/3,261.37 = 714.55/x
  3. Step 3: Cross multiply
    2,175.79x = 3,261.37 × 714.55
  4. Step 4: Simplify right side
    2,175.79x = 2,330,411.93
  5. Step 5: Solve for x
    x = 2,330,411.93/2,175.79
  6. Step 6: Final answer
    x = 1,071.06

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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.