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Finding the Fourth Proportional to 1,272,648, 1,908,983.52 and 386,184

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Solution

The fourth proportional to 1,272,648, 1,908,983.52 and 386,184 is: 579,279.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,648 : 1,908,983.52 = 386,184 : x
  2. Step 2: Convert to fraction form
    1,272,648/1,908,983.52 = 386,184/x
  3. Step 3: Cross multiply
    1,272,648x = 1,908,983.52 × 386,184
  4. Step 4: Simplify right side
    1,272,648x = 737,218,891,687.68
  5. Step 5: Solve for x
    x = 737,218,891,687.68/1,272,648
  6. Step 6: Final answer
    x = 579,279.50

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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.