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Finding the Fourth Proportional to 485,400.44, 669,704.17 and 281,410.65

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Solution

The fourth proportional to 485,400.44, 669,704.17 and 281,410.65 is: 388,260.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,400.44 : 669,704.17 = 281,410.65 : x
  2. Step 2: Convert to fraction form
    485,400.44/669,704.17 = 281,410.65/x
  3. Step 3: Cross multiply
    485,400.44x = 669,704.17 × 281,410.65
  4. Step 4: Simplify right side
    485,400.44x = 188,461,885,787.41
  5. Step 5: Solve for x
    x = 188,461,885,787.41/485,400.44
  6. Step 6: Final answer
    x = 388,260.64

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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.