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Finding the Fourth Proportional to 3,490.30, 4,815.78 and 1,977.89

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Solution

The fourth proportional to 3,490.30, 4,815.78 and 1,977.89 is: 2,729.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.30 : 4,815.78 = 1,977.89 : x
  2. Step 2: Convert to fraction form
    3,490.30/4,815.78 = 1,977.89/x
  3. Step 3: Cross multiply
    3,490.30x = 4,815.78 × 1,977.89
  4. Step 4: Simplify right side
    3,490.30x = 9,525,083.10
  5. Step 5: Solve for x
    x = 9,525,083.10/3,490.30
  6. Step 6: Final answer
    x = 2,729.02

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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.