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Finding the Fourth Proportional to 321,659.60, 482,490.64 and 134,539.84

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Solution

The fourth proportional to 321,659.60, 482,490.64 and 134,539.84 is: 201,810.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,659.60 : 482,490.64 = 134,539.84 : x
  2. Step 2: Convert to fraction form
    321,659.60/482,490.64 = 134,539.84/x
  3. Step 3: Cross multiply
    321,659.60x = 482,490.64 × 134,539.84
  4. Step 4: Simplify right side
    321,659.60x = 64,914,213,507.10
  5. Step 5: Solve for x
    x = 64,914,213,507.10/321,659.60
  6. Step 6: Final answer
    x = 201,810.28

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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.