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Finding the Fourth Proportional to 442,912.90, 664,369.35 and 411,420.10

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Solution

The fourth proportional to 442,912.90, 664,369.35 and 411,420.10 is: 617,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,912.90 : 664,369.35 = 411,420.10 : x
  2. Step 2: Convert to fraction form
    442,912.90/664,369.35 = 411,420.10/x
  3. Step 3: Cross multiply
    442,912.90x = 664,369.35 × 411,420.10
  4. Step 4: Simplify right side
    442,912.90x = 273,334,904,413.94
  5. Step 5: Solve for x
    x = 273,334,904,413.94/442,912.90
  6. Step 6: Final answer
    x = 617,130.15

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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.