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Finding the Fourth Proportional to 423,076.30, 634,614.45 and 404,413.90

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Solution

The fourth proportional to 423,076.30, 634,614.45 and 404,413.90 is: 606,620.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,076.30 : 634,614.45 = 404,413.90 : x
  2. Step 2: Convert to fraction form
    423,076.30/634,614.45 = 404,413.90/x
  3. Step 3: Cross multiply
    423,076.30x = 634,614.45 × 404,413.90
  4. Step 4: Simplify right side
    423,076.30x = 256,646,904,720.86
  5. Step 5: Solve for x
    x = 256,646,904,720.86/423,076.30
  6. Step 6: Final answer
    x = 606,620.85

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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.