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Finding the Fourth Proportional to 308,511.18, 425,712.51 and 172,531.08

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Solution

The fourth proportional to 308,511.18, 425,712.51 and 172,531.08 is: 238,074.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,511.18 : 425,712.51 = 172,531.08 : x
  2. Step 2: Convert to fraction form
    308,511.18/425,712.51 = 172,531.08/x
  3. Step 3: Cross multiply
    308,511.18x = 425,712.51 × 172,531.08
  4. Step 4: Simplify right side
    308,511.18x = 73,448,639,119.81
  5. Step 5: Solve for x
    x = 73,448,639,119.81/308,511.18
  6. Step 6: Final answer
    x = 238,074.48

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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.