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Finding the Fourth Proportional to 611,149.95, 912,609 and 499,049.19

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Solution

The fourth proportional to 611,149.95, 912,609 and 499,049.19 is: 745,212.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,149.95 : 912,609 = 499,049.19 : x
  2. Step 2: Convert to fraction form
    611,149.95/912,609 = 499,049.19/x
  3. Step 3: Cross multiply
    611,149.95x = 912,609 × 499,049.19
  4. Step 4: Simplify right side
    611,149.95x = 455,436,782,236.71
  5. Step 5: Solve for x
    x = 455,436,782,236.71/611,149.95
  6. Step 6: Final answer
    x = 745,212.83

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.