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Finding the Fourth Proportional to 612,707.20, 919,089.60 and 191,996.80

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Solution

The fourth proportional to 612,707.20, 919,089.60 and 191,996.80 is: 288,004.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,707.20 : 919,089.60 = 191,996.80 : x
  2. Step 2: Convert to fraction form
    612,707.20/919,089.60 = 191,996.80/x
  3. Step 3: Cross multiply
    612,707.20x = 919,089.60 × 191,996.80
  4. Step 4: Simplify right side
    612,707.20x = 176,462,262,113.28
  5. Step 5: Solve for x
    x = 176,462,262,113.28/612,707.20
  6. Step 6: Final answer
    x = 288,004.22

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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.