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Finding the Fourth Proportional to 407,719.65, 611,579.48 and 127,200.45

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Solution

The fourth proportional to 407,719.65, 611,579.48 and 127,200.45 is: 190,800.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,719.65 : 611,579.48 = 127,200.45 : x
  2. Step 2: Convert to fraction form
    407,719.65/611,579.48 = 127,200.45/x
  3. Step 3: Cross multiply
    407,719.65x = 611,579.48 × 127,200.45
  4. Step 4: Simplify right side
    407,719.65x = 77,793,184,430.76
  5. Step 5: Solve for x
    x = 77,793,184,430.76/407,719.65
  6. Step 6: Final answer
    x = 190,800.68

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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.