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Finding the Fourth Proportional to 330,394.65, 455,953.96 and 187,154.65

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Solution

The fourth proportional to 330,394.65, 455,953.96 and 187,154.65 is: 258,278.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,394.65 : 455,953.96 = 187,154.65 : x
  2. Step 2: Convert to fraction form
    330,394.65/455,953.96 = 187,154.65/x
  3. Step 3: Cross multiply
    330,394.65x = 455,953.96 × 187,154.65
  4. Step 4: Simplify right side
    330,394.65x = 85,333,904,603.80
  5. Step 5: Solve for x
    x = 85,333,904,603.80/330,394.65
  6. Step 6: Final answer
    x = 258,278.71

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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.