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Finding the Fourth Proportional to 612,796.80, 917,380.80 and 455,721.60

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Solution

The fourth proportional to 612,796.80, 917,380.80 and 455,721.60 is: 682,233.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,796.80 : 917,380.80 = 455,721.60 : x
  2. Step 2: Convert to fraction form
    612,796.80/917,380.80 = 455,721.60/x
  3. Step 3: Cross multiply
    612,796.80x = 917,380.80 × 455,721.60
  4. Step 4: Simplify right side
    612,796.80x = 418,070,245,985.28
  5. Step 5: Solve for x
    x = 418,070,245,985.28/612,796.80
  6. Step 6: Final answer
    x = 682,233.08

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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.