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Finding the Fourth Proportional to 231,678.80, 348,260.60 and 215,243.60

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Solution

The fourth proportional to 231,678.80, 348,260.60 and 215,243.60 is: 323,555.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,678.80 : 348,260.60 = 215,243.60 : x
  2. Step 2: Convert to fraction form
    231,678.80/348,260.60 = 215,243.60/x
  3. Step 3: Cross multiply
    231,678.80x = 348,260.60 × 215,243.60
  4. Step 4: Simplify right side
    231,678.80x = 74,960,865,282.16
  5. Step 5: Solve for x
    x = 74,960,865,282.16/231,678.80
  6. Step 6: Final answer
    x = 323,555.13

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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.