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Finding the Fourth Proportional to 439,709.60, 657,490.80 and 327,735.20

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Solution

The fourth proportional to 439,709.60, 657,490.80 and 327,735.20 is: 490,057.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,709.60 : 657,490.80 = 327,735.20 : x
  2. Step 2: Convert to fraction form
    439,709.60/657,490.80 = 327,735.20/x
  3. Step 3: Cross multiply
    439,709.60x = 657,490.80 × 327,735.20
  4. Step 4: Simplify right side
    439,709.60x = 215,482,878,836.16
  5. Step 5: Solve for x
    x = 215,482,878,836.16/439,709.60
  6. Step 6: Final answer
    x = 490,057.25

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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.