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Finding the Fourth Proportional to 612,669.80, 919,005.24 and 191,978.48

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Solution

The fourth proportional to 612,669.80, 919,005.24 and 191,978.48 is: 287,967.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,669.80 : 919,005.24 = 191,978.48 : x
  2. Step 2: Convert to fraction form
    612,669.80/919,005.24 = 191,978.48/x
  3. Step 3: Cross multiply
    612,669.80x = 919,005.24 × 191,978.48
  4. Step 4: Simplify right side
    612,669.80x = 176,429,229,087.24
  5. Step 5: Solve for x
    x = 176,429,229,087.24/612,669.80
  6. Step 6: Final answer
    x = 287,967.89

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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.