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Finding the Fourth Proportional to 1,611.10, 2,415.47 and 514.84

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Solution

The fourth proportional to 1,611.10, 2,415.47 and 514.84 is: 771.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.10 : 2,415.47 = 514.84 : x
  2. Step 2: Convert to fraction form
    1,611.10/2,415.47 = 514.84/x
  3. Step 3: Cross multiply
    1,611.10x = 2,415.47 × 514.84
  4. Step 4: Simplify right side
    1,611.10x = 1,243,580.57
  5. Step 5: Solve for x
    x = 1,243,580.57/1,611.10
  6. Step 6: Final answer
    x = 771.88

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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.