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Finding the Fourth Proportional to 308,311.61, 425,461.05 and 172,345.82

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Solution

The fourth proportional to 308,311.61, 425,461.05 and 172,345.82 is: 237,832.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,311.61 : 425,461.05 = 172,345.82 : x
  2. Step 2: Convert to fraction form
    308,311.61/425,461.05 = 172,345.82/x
  3. Step 3: Cross multiply
    308,311.61x = 425,461.05 × 172,345.82
  4. Step 4: Simplify right side
    308,311.61x = 73,326,431,413.01
  5. Step 5: Solve for x
    x = 73,326,431,413.01/308,311.61
  6. Step 6: Final answer
    x = 237,832.21

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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.