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Finding the Fourth Proportional to 2,051.70, 3,078.06 and 753.18

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Solution

The fourth proportional to 2,051.70, 3,078.06 and 753.18 is: 1,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,051.70 : 3,078.06 = 753.18 : x
  2. Step 2: Convert to fraction form
    2,051.70/3,078.06 = 753.18/x
  3. Step 3: Cross multiply
    2,051.70x = 3,078.06 × 753.18
  4. Step 4: Simplify right side
    2,051.70x = 2,318,333.23
  5. Step 5: Solve for x
    x = 2,318,333.23/2,051.70
  6. Step 6: Final answer
    x = 1,129.96

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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.