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Finding the Fourth Proportional to 407,959.92, 611,939.76 and 127,477.17

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Solution

The fourth proportional to 407,959.92, 611,939.76 and 127,477.17 is: 191,215.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,959.92 : 611,939.76 = 127,477.17 : x
  2. Step 2: Convert to fraction form
    407,959.92/611,939.76 = 127,477.17/x
  3. Step 3: Cross multiply
    407,959.92x = 611,939.76 × 127,477.17
  4. Step 4: Simplify right side
    407,959.92x = 78,008,347,333.22
  5. Step 5: Solve for x
    x = 78,008,347,333.22/407,959.92
  6. Step 6: Final answer
    x = 191,215.72

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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.