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Finding the Fourth Proportional to 357,921.86, 535,714.55 and 263,126.94

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Solution

The fourth proportional to 357,921.86, 535,714.55 and 263,126.94 is: 393,831.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,921.86 : 535,714.55 = 263,126.94 : x
  2. Step 2: Convert to fraction form
    357,921.86/535,714.55 = 263,126.94/x
  3. Step 3: Cross multiply
    357,921.86x = 535,714.55 × 263,126.94
  4. Step 4: Simplify right side
    357,921.86x = 140,960,928,939.34
  5. Step 5: Solve for x
    x = 140,960,928,939.34/357,921.86
  6. Step 6: Final answer
    x = 393,831.58

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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.