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Finding the Fourth Proportional to 358,988.80, 537,446.40 and 219,020.80

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Solution

The fourth proportional to 358,988.80, 537,446.40 and 219,020.80 is: 327,898.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,988.80 : 537,446.40 = 219,020.80 : x
  2. Step 2: Convert to fraction form
    358,988.80/537,446.40 = 219,020.80/x
  3. Step 3: Cross multiply
    358,988.80x = 537,446.40 × 219,020.80
  4. Step 4: Simplify right side
    358,988.80x = 117,711,940,485.12
  5. Step 5: Solve for x
    x = 117,711,940,485.12/358,988.80
  6. Step 6: Final answer
    x = 327,898.64

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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.