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Finding the Fourth Proportional to 308,030, 425,081.40 and 173,894

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Solution

The fourth proportional to 308,030, 425,081.40 and 173,894 is: 239,973.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,030 : 425,081.40 = 173,894 : x
  2. Step 2: Convert to fraction form
    308,030/425,081.40 = 173,894/x
  3. Step 3: Cross multiply
    308,030x = 425,081.40 × 173,894
  4. Step 4: Simplify right side
    308,030x = 73,919,104,971.60
  5. Step 5: Solve for x
    x = 73,919,104,971.60/308,030
  6. Step 6: Final answer
    x = 239,973.72

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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.