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Finding the Fourth Proportional to 330,647.31, 495,960.03 and 143,658.81

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Solution

The fourth proportional to 330,647.31, 495,960.03 and 143,658.81 is: 215,483.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,647.31 : 495,960.03 = 143,658.81 : x
  2. Step 2: Convert to fraction form
    330,647.31/495,960.03 = 143,658.81/x
  3. Step 3: Cross multiply
    330,647.31x = 495,960.03 × 143,658.81
  4. Step 4: Simplify right side
    330,647.31x = 71,249,027,717.36
  5. Step 5: Solve for x
    x = 71,249,027,717.36/330,647.31
  6. Step 6: Final answer
    x = 215,483.46

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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.