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Finding the Fourth Proportional to 308,143.65, 425,230.23 and 172,178.73

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Solution

The fourth proportional to 308,143.65, 425,230.23 and 172,178.73 is: 237,602.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,143.65 : 425,230.23 = 172,178.73 : x
  2. Step 2: Convert to fraction form
    308,143.65/425,230.23 = 172,178.73/x
  3. Step 3: Cross multiply
    308,143.65x = 425,230.23 × 172,178.73
  4. Step 4: Simplify right side
    308,143.65x = 73,215,600,959.01
  5. Step 5: Solve for x
    x = 73,215,600,959.01/308,143.65
  6. Step 6: Final answer
    x = 237,602.17

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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.