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Finding the Fourth Proportional to 578,404.72, 866,477.11 and 398,458.36

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Solution

The fourth proportional to 578,404.72, 866,477.11 and 398,458.36 is: 596,909.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,404.72 : 866,477.11 = 398,458.36 : x
  2. Step 2: Convert to fraction form
    578,404.72/866,477.11 = 398,458.36/x
  3. Step 3: Cross multiply
    578,404.72x = 866,477.11 × 398,458.36
  4. Step 4: Simplify right side
    578,404.72x = 345,255,048,228.14
  5. Step 5: Solve for x
    x = 345,255,048,228.14/578,404.72
  6. Step 6: Final answer
    x = 596,909.11

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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.