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Finding the Fourth Proportional to 527,136.51, 790,697.78 and 127,780.80

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Solution

The fourth proportional to 527,136.51, 790,697.78 and 127,780.80 is: 191,669.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,136.51 : 790,697.78 = 127,780.80 : x
  2. Step 2: Convert to fraction form
    527,136.51/790,697.78 = 127,780.80/x
  3. Step 3: Cross multiply
    527,136.51x = 790,697.78 × 127,780.80
  4. Step 4: Simplify right side
    527,136.51x = 101,035,994,886.62
  5. Step 5: Solve for x
    x = 101,035,994,886.62/527,136.51
  6. Step 6: Final answer
    x = 191,669.51

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1.5x scale

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.