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Finding the Fourth Proportional to 308,955.58, 426,323.46 and 172,970.62

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Solution

The fourth proportional to 308,955.58, 426,323.46 and 172,970.62 is: 238,679.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,955.58 : 426,323.46 = 172,970.62 : x
  2. Step 2: Convert to fraction form
    308,955.58/426,323.46 = 172,970.62/x
  3. Step 3: Cross multiply
    308,955.58x = 426,323.46 × 172,970.62
  4. Step 4: Simplify right side
    308,955.58x = 73,741,433,196.75
  5. Step 5: Solve for x
    x = 73,741,433,196.75/308,955.58
  6. Step 6: Final answer
    x = 238,679.73

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1.5x scale

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.