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Finding the Fourth Proportional to 258,719.80, 388,079.70 and 227,615.80

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Solution

The fourth proportional to 258,719.80, 388,079.70 and 227,615.80 is: 341,423.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,719.80 : 388,079.70 = 227,615.80 : x
  2. Step 2: Convert to fraction form
    258,719.80/388,079.70 = 227,615.80/x
  3. Step 3: Cross multiply
    258,719.80x = 388,079.70 × 227,615.80
  4. Step 4: Simplify right side
    258,719.80x = 88,333,071,379.26
  5. Step 5: Solve for x
    x = 88,333,071,379.26/258,719.80
  6. Step 6: Final answer
    x = 341,423.70

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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.