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Finding the Fourth Proportional to 330,401.66, 455,963.62 and 187,161.66

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Solution

The fourth proportional to 330,401.66, 455,963.62 and 187,161.66 is: 258,288.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,401.66 : 455,963.62 = 187,161.66 : x
  2. Step 2: Convert to fraction form
    330,401.66/455,963.62 = 187,161.66/x
  3. Step 3: Cross multiply
    330,401.66x = 455,963.62 × 187,161.66
  4. Step 4: Simplify right side
    330,401.66x = 85,338,908,018.81
  5. Step 5: Solve for x
    x = 85,338,908,018.81/330,401.66
  6. Step 6: Final answer
    x = 258,288.38

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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.