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Finding the Fourth Proportional to 308,342.84, 425,516.28 and 172,384.34

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Solution

The fourth proportional to 308,342.84, 425,516.28 and 172,384.34 is: 237,892.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,342.84 : 425,516.28 = 172,384.34 : x
  2. Step 2: Convert to fraction form
    308,342.84/425,516.28 = 172,384.34/x
  3. Step 3: Cross multiply
    308,342.84x = 425,516.28 × 172,384.34
  4. Step 4: Simplify right side
    308,342.84x = 73,352,340,959.47
  5. Step 5: Solve for x
    x = 73,352,340,959.47/308,342.84
  6. Step 6: Final answer
    x = 237,892.15

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1.5x scale

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.