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Finding the Fourth Proportional to 308,818.71, 426,165.64 and 172,852.62

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Solution

The fourth proportional to 308,818.71, 426,165.64 and 172,852.62 is: 238,534.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,818.71 : 426,165.64 = 172,852.62 : x
  2. Step 2: Convert to fraction form
    308,818.71/426,165.64 = 172,852.62/x
  3. Step 3: Cross multiply
    308,818.71x = 426,165.64 × 172,852.62
  4. Step 4: Simplify right side
    308,818.71x = 73,663,845,397.72
  5. Step 5: Solve for x
    x = 73,663,845,397.72/308,818.71
  6. Step 6: Final answer
    x = 238,534.27

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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.