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Finding the Fourth Proportional to 3,491.30, 4,817.16 and 1,978.89

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Solution

The fourth proportional to 3,491.30, 4,817.16 and 1,978.89 is: 2,730.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.30 : 4,817.16 = 1,978.89 : x
  2. Step 2: Convert to fraction form
    3,491.30/4,817.16 = 1,978.89/x
  3. Step 3: Cross multiply
    3,491.30x = 4,817.16 × 1,978.89
  4. Step 4: Simplify right side
    3,491.30x = 9,532,629.75
  5. Step 5: Solve for x
    x = 9,532,629.75/3,491.30
  6. Step 6: Final answer
    x = 2,730.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.