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Finding the Fourth Proportional to 309,178.72, 426,569.79 and 173,194.30

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Solution

The fourth proportional to 309,178.72, 426,569.79 and 173,194.30 is: 238,953.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,178.72 : 426,569.79 = 173,194.30 : x
  2. Step 2: Convert to fraction form
    309,178.72/426,569.79 = 173,194.30/x
  3. Step 3: Cross multiply
    309,178.72x = 426,569.79 × 173,194.30
  4. Step 4: Simplify right side
    309,178.72x = 73,879,456,180.20
  5. Step 5: Solve for x
    x = 73,879,456,180.20/309,178.72
  6. Step 6: Final answer
    x = 238,953.88

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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.