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Finding the Fourth Proportional to 308,881.11, 426,252.66 and 172,916.17

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Solution

The fourth proportional to 308,881.11, 426,252.66 and 172,916.17 is: 238,622.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,881.11 : 426,252.66 = 172,916.17 : x
  2. Step 2: Convert to fraction form
    308,881.11/426,252.66 = 172,916.17/x
  3. Step 3: Cross multiply
    308,881.11x = 426,252.66 × 172,916.17
  4. Step 4: Simplify right side
    308,881.11x = 73,705,977,419.51
  5. Step 5: Solve for x
    x = 73,705,977,419.51/308,881.11
  6. Step 6: Final answer
    x = 238,622.48

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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.