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Finding the Fourth Proportional to 208,061.40, 312,092.10 and 205,987.80

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Solution

The fourth proportional to 208,061.40, 312,092.10 and 205,987.80 is: 308,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,061.40 : 312,092.10 = 205,987.80 : x
  2. Step 2: Convert to fraction form
    208,061.40/312,092.10 = 205,987.80/x
  3. Step 3: Cross multiply
    208,061.40x = 312,092.10 × 205,987.80
  4. Step 4: Simplify right side
    208,061.40x = 64,287,165,076.38
  5. Step 5: Solve for x
    x = 64,287,165,076.38/208,061.40
  6. Step 6: Final answer
    x = 308,981.70

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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.