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Finding the Fourth Proportional to 361,318.80, 540,941.40 and 221,350.80

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Solution

The fourth proportional to 361,318.80, 540,941.40 and 221,350.80 is: 331,391.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,318.80 : 540,941.40 = 221,350.80 : x
  2. Step 2: Convert to fraction form
    361,318.80/540,941.40 = 221,350.80/x
  3. Step 3: Cross multiply
    361,318.80x = 540,941.40 × 221,350.80
  4. Step 4: Simplify right side
    361,318.80x = 119,737,811,643.12
  5. Step 5: Solve for x
    x = 119,737,811,643.12/361,318.80
  6. Step 6: Final answer
    x = 331,391.04

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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.