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Finding the Fourth Proportional to 330,448.20, 495,393.66 and 143,318.76

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Solution

The fourth proportional to 330,448.20, 495,393.66 and 143,318.76 is: 214,857.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,448.20 : 495,393.66 = 143,318.76 : x
  2. Step 2: Convert to fraction form
    330,448.20/495,393.66 = 143,318.76/x
  3. Step 3: Cross multiply
    330,448.20x = 495,393.66 × 143,318.76
  4. Step 4: Simplify right side
    330,448.20x = 70,999,205,063.06
  5. Step 5: Solve for x
    x = 70,999,205,063.06/330,448.20
  6. Step 6: Final answer
    x = 214,857.29

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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.