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Finding the Fourth Proportional to 330,836.40, 495,270.45 and 218,643.30

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Solution

The fourth proportional to 330,836.40, 495,270.45 and 218,643.30 is: 327,314.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,836.40 : 495,270.45 = 218,643.30 : x
  2. Step 2: Convert to fraction form
    330,836.40/495,270.45 = 218,643.30/x
  3. Step 3: Cross multiply
    330,836.40x = 495,270.45 × 218,643.30
  4. Step 4: Simplify right side
    330,836.40x = 108,287,565,580.49
  5. Step 5: Solve for x
    x = 108,287,565,580.49/330,836.40
  6. Step 6: Final answer
    x = 327,314.54

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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.