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Finding the Fourth Proportional to 1,076.31, 1,611.72 and 710.55

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Solution

The fourth proportional to 1,076.31, 1,611.72 and 710.55 is: 1,064.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.31 : 1,611.72 = 710.55 : x
  2. Step 2: Convert to fraction form
    1,076.31/1,611.72 = 710.55/x
  3. Step 3: Cross multiply
    1,076.31x = 1,611.72 × 710.55
  4. Step 4: Simplify right side
    1,076.31x = 1,145,207.65
  5. Step 5: Solve for x
    x = 1,145,207.65/1,076.31
  6. Step 6: Final answer
    x = 1,064.01

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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.