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Finding the Fourth Proportional to 399,081.04, 550,935 and 308,233.06

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Solution

The fourth proportional to 399,081.04, 550,935 and 308,233.06 is: 425,518.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,081.04 : 550,935 = 308,233.06 : x
  2. Step 2: Convert to fraction form
    399,081.04/550,935 = 308,233.06/x
  3. Step 3: Cross multiply
    399,081.04x = 550,935 × 308,233.06
  4. Step 4: Simplify right side
    399,081.04x = 169,816,380,911.10
  5. Step 5: Solve for x
    x = 169,816,380,911.10/399,081.04
  6. Step 6: Final answer
    x = 425,518.54

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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.