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Finding the Fourth Proportional to 274,080.80, 411,121.20 and 258,874.40

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Solution

The fourth proportional to 274,080.80, 411,121.20 and 258,874.40 is: 388,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,080.80 : 411,121.20 = 258,874.40 : x
  2. Step 2: Convert to fraction form
    274,080.80/411,121.20 = 258,874.40/x
  3. Step 3: Cross multiply
    274,080.80x = 411,121.20 × 258,874.40
  4. Step 4: Simplify right side
    274,080.80x = 106,428,753,977.28
  5. Step 5: Solve for x
    x = 106,428,753,977.28/274,080.80
  6. Step 6: Final answer
    x = 388,311.60

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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.