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Finding the Fourth Proportional to 668,018.01, 921,764.57 and 381,477.45

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Solution

The fourth proportional to 668,018.01, 921,764.57 and 381,477.45 is: 526,381.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,018.01 : 921,764.57 = 381,477.45 : x
  2. Step 2: Convert to fraction form
    668,018.01/921,764.57 = 381,477.45/x
  3. Step 3: Cross multiply
    668,018.01x = 921,764.57 × 381,477.45
  4. Step 4: Simplify right side
    668,018.01x = 351,632,395,756.56
  5. Step 5: Solve for x
    x = 351,632,395,756.56/668,018.01
  6. Step 6: Final answer
    x = 526,381.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.