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Finding the Fourth Proportional to 612,212.80, 916,504.80 and 455,137.60

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Solution

The fourth proportional to 612,212.80, 916,504.80 and 455,137.60 is: 681,357.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,212.80 : 916,504.80 = 455,137.60 : x
  2. Step 2: Convert to fraction form
    612,212.80/916,504.80 = 455,137.60/x
  3. Step 3: Cross multiply
    612,212.80x = 916,504.80 × 455,137.60
  4. Step 4: Simplify right side
    612,212.80x = 417,135,795,060.48
  5. Step 5: Solve for x
    x = 417,135,795,060.48/612,212.80
  6. Step 6: Final answer
    x = 681,357.52

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1.5x scale

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.