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Finding the Fourth Proportional to 361,312.80, 540,932.40 and 221,344.80

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Solution

The fourth proportional to 361,312.80, 540,932.40 and 221,344.80 is: 331,382.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,312.80 : 540,932.40 = 221,344.80 : x
  2. Step 2: Convert to fraction form
    361,312.80/540,932.40 = 221,344.80/x
  3. Step 3: Cross multiply
    361,312.80x = 540,932.40 × 221,344.80
  4. Step 4: Simplify right side
    361,312.80x = 119,732,573,891.52
  5. Step 5: Solve for x
    x = 119,732,573,891.52/361,312.80
  6. Step 6: Final answer
    x = 331,382.04

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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.