Home / 308,788.40-426,135.64-172,821.20

Finding the Fourth Proportional to 308,788.40, 426,135.64 and 172,821.20

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Solution

The fourth proportional to 308,788.40, 426,135.64 and 172,821.20 is: 238,497.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,788.40 : 426,135.64 = 172,821.20 : x
  2. Step 2: Convert to fraction form
    308,788.40/426,135.64 = 172,821.20/x
  3. Step 3: Cross multiply
    308,788.40x = 426,135.64 × 172,821.20
  4. Step 4: Simplify right side
    308,788.40x = 73,645,272,667.57
  5. Step 5: Solve for x
    x = 73,645,272,667.57/308,788.40
  6. Step 6: Final answer
    x = 238,497.54

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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.