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Finding the Fourth Proportional to 321,875.80, 482,813.70 and 210,464.60

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Solution

The fourth proportional to 321,875.80, 482,813.70 and 210,464.60 is: 315,696.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,875.80 : 482,813.70 = 210,464.60 : x
  2. Step 2: Convert to fraction form
    321,875.80/482,813.70 = 210,464.60/x
  3. Step 3: Cross multiply
    321,875.80x = 482,813.70 × 210,464.60
  4. Step 4: Simplify right side
    321,875.80x = 101,615,192,245.02
  5. Step 5: Solve for x
    x = 101,615,192,245.02/321,875.80
  6. Step 6: Final answer
    x = 315,696.90

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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.