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Finding the Fourth Proportional to 620,780.10, 930,951.45 and 221,433.90

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Solution

The fourth proportional to 620,780.10, 930,951.45 and 221,433.90 is: 332,072.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,780.10 : 930,951.45 = 221,433.90 : x
  2. Step 2: Convert to fraction form
    620,780.10/930,951.45 = 221,433.90/x
  3. Step 3: Cross multiply
    620,780.10x = 930,951.45 × 221,433.90
  4. Step 4: Simplify right side
    620,780.10x = 206,144,210,284.16
  5. Step 5: Solve for x
    x = 206,144,210,284.16/620,780.10
  6. Step 6: Final answer
    x = 332,072.84

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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.