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Finding the Fourth Proportional to 353,936.40, 530,904.60 and 339,939.60

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Solution

The fourth proportional to 353,936.40, 530,904.60 and 339,939.60 is: 509,909.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,936.40 : 530,904.60 = 339,939.60 : x
  2. Step 2: Convert to fraction form
    353,936.40/530,904.60 = 339,939.60/x
  3. Step 3: Cross multiply
    353,936.40x = 530,904.60 × 339,939.60
  4. Step 4: Simplify right side
    353,936.40x = 180,475,497,362.16
  5. Step 5: Solve for x
    x = 180,475,497,362.16/353,936.40
  6. Step 6: Final answer
    x = 509,909.40

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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.