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Finding the Fourth Proportional to 663,245.93, 915,019.57 and 408,154.25

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Solution

The fourth proportional to 663,245.93, 915,019.57 and 408,154.25 is: 563,092.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,245.93 : 915,019.57 = 408,154.25 : x
  2. Step 2: Convert to fraction form
    663,245.93/915,019.57 = 408,154.25/x
  3. Step 3: Cross multiply
    663,245.93x = 915,019.57 × 408,154.25
  4. Step 4: Simplify right side
    663,245.93x = 373,469,129,126.41
  5. Step 5: Solve for x
    x = 373,469,129,126.41/663,245.93
  6. Step 6: Final answer
    x = 563,092.98

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Double scale
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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.