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Finding the Fourth Proportional to 308,636.36, 425,900.93 and 172,644.05

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Solution

The fourth proportional to 308,636.36, 425,900.93 and 172,644.05 is: 238,239.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,636.36 : 425,900.93 = 172,644.05 : x
  2. Step 2: Convert to fraction form
    308,636.36/425,900.93 = 172,644.05/x
  3. Step 3: Cross multiply
    308,636.36x = 425,900.93 × 172,644.05
  4. Step 4: Simplify right side
    308,636.36x = 73,529,258,461.24
  5. Step 5: Solve for x
    x = 73,529,258,461.24/308,636.36
  6. Step 6: Final answer
    x = 238,239.14

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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.