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Finding the Fourth Proportional to 3,980.34, 5,970.52 and 1,347.86

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Solution

The fourth proportional to 3,980.34, 5,970.52 and 1,347.86 is: 2,021.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.34 : 5,970.52 = 1,347.86 : x
  2. Step 2: Convert to fraction form
    3,980.34/5,970.52 = 1,347.86/x
  3. Step 3: Cross multiply
    3,980.34x = 5,970.52 × 1,347.86
  4. Step 4: Simplify right side
    3,980.34x = 8,047,425.09
  5. Step 5: Solve for x
    x = 8,047,425.09/3,980.34
  6. Step 6: Final answer
    x = 2,021.79

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1.5x scale

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.