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Finding the Fourth Proportional to 612,020.80, 916,937.70 and 295,780.60

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Solution

The fourth proportional to 612,020.80, 916,937.70 and 295,780.60 is: 443,142.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,020.80 : 916,937.70 = 295,780.60 : x
  2. Step 2: Convert to fraction form
    612,020.80/916,937.70 = 295,780.60/x
  3. Step 3: Cross multiply
    612,020.80x = 916,937.70 × 295,780.60
  4. Step 4: Simplify right side
    612,020.80x = 271,212,383,068.62
  5. Step 5: Solve for x
    x = 271,212,383,068.62/612,020.80
  6. Step 6: Final answer
    x = 443,142.43

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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.