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Finding the Fourth Proportional to 4,751.56, 7,127.34 and 1,978.66

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Solution

The fourth proportional to 4,751.56, 7,127.34 and 1,978.66 is: 2,967.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,751.56 : 7,127.34 = 1,978.66 : x
  2. Step 2: Convert to fraction form
    4,751.56/7,127.34 = 1,978.66/x
  3. Step 3: Cross multiply
    4,751.56x = 7,127.34 × 1,978.66
  4. Step 4: Simplify right side
    4,751.56x = 14,102,582.56
  5. Step 5: Solve for x
    x = 14,102,582.56/4,751.56
  6. Step 6: Final answer
    x = 2,967.99

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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.