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Finding the Fourth Proportional to 308,491.60, 425,740.08 and 172,538.20

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Solution

The fourth proportional to 308,491.60, 425,740.08 and 172,538.20 is: 238,114.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,491.60 : 425,740.08 = 172,538.20 : x
  2. Step 2: Convert to fraction form
    308,491.60/425,740.08 = 172,538.20/x
  3. Step 3: Cross multiply
    308,491.60x = 425,740.08 × 172,538.20
  4. Step 4: Simplify right side
    308,491.60x = 73,456,427,071.06
  5. Step 5: Solve for x
    x = 73,456,427,071.06/308,491.60
  6. Step 6: Final answer
    x = 238,114.84

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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.