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Finding the Fourth Proportional to 309,341.92, 426,871.52 and 181,992.80

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Solution

The fourth proportional to 309,341.92, 426,871.52 and 181,992.80 is: 251,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,341.92 : 426,871.52 = 181,992.80 : x
  2. Step 2: Convert to fraction form
    309,341.92/426,871.52 = 181,992.80/x
  3. Step 3: Cross multiply
    309,341.92x = 426,871.52 × 181,992.80
  4. Step 4: Simplify right side
    309,341.92x = 77,687,543,165.06
  5. Step 5: Solve for x
    x = 77,687,543,165.06/309,341.92
  6. Step 6: Final answer
    x = 251,138.10

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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.