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Finding the Fourth Proportional to 520,511.85, 780,576.54 and 178,858.38

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Solution

The fourth proportional to 520,511.85, 780,576.54 and 178,858.38 is: 268,221.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,511.85 : 780,576.54 = 178,858.38 : x
  2. Step 2: Convert to fraction form
    520,511.85/780,576.54 = 178,858.38/x
  3. Step 3: Cross multiply
    520,511.85x = 780,576.54 × 178,858.38
  4. Step 4: Simplify right side
    520,511.85x = 139,612,657,666.85
  5. Step 5: Solve for x
    x = 139,612,657,666.85/520,511.85
  6. Step 6: Final answer
    x = 268,221.86

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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.