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Finding the Fourth Proportional to 485,416.88, 669,863.88 and 281,504.24

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Solution

The fourth proportional to 485,416.88, 669,863.88 and 281,504.24 is: 388,469.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,416.88 : 669,863.88 = 281,504.24 : x
  2. Step 2: Convert to fraction form
    485,416.88/669,863.88 = 281,504.24/x
  3. Step 3: Cross multiply
    485,416.88x = 669,863.88 × 281,504.24
  4. Step 4: Simplify right side
    485,416.88x = 188,569,522,442.85
  5. Step 5: Solve for x
    x = 188,569,522,442.85/485,416.88
  6. Step 6: Final answer
    x = 388,469.23

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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.