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Finding the Fourth Proportional to 485,662.11, 670,037.91 and 281,600.64

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Solution

The fourth proportional to 485,662.11, 670,037.91 and 281,600.64 is: 388,506.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,662.11 : 670,037.91 = 281,600.64 : x
  2. Step 2: Convert to fraction form
    485,662.11/670,037.91 = 281,600.64/x
  3. Step 3: Cross multiply
    485,662.11x = 670,037.91 × 281,600.64
  4. Step 4: Simplify right side
    485,662.11x = 188,683,104,280.26
  5. Step 5: Solve for x
    x = 188,683,104,280.26/485,662.11
  6. Step 6: Final answer
    x = 388,506.95

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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.