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Finding the Fourth Proportional to 612,789.80, 917,370.30 and 455,714.60

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Solution

The fourth proportional to 612,789.80, 917,370.30 and 455,714.60 is: 682,222.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,789.80 : 917,370.30 = 455,714.60 : x
  2. Step 2: Convert to fraction form
    612,789.80/917,370.30 = 455,714.60/x
  3. Step 3: Cross multiply
    612,789.80x = 917,370.30 × 455,714.60
  4. Step 4: Simplify right side
    612,789.80x = 418,059,039,316.38
  5. Step 5: Solve for x
    x = 418,059,039,316.38/612,789.80
  6. Step 6: Final answer
    x = 682,222.58

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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.