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Finding the Fourth Proportional to 399,062.89, 550,705.48 and 217,774.81

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Solution

The fourth proportional to 399,062.89, 550,705.48 and 217,774.81 is: 300,528.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,062.89 : 550,705.48 = 217,774.81 : x
  2. Step 2: Convert to fraction form
    399,062.89/550,705.48 = 217,774.81/x
  3. Step 3: Cross multiply
    399,062.89x = 550,705.48 × 217,774.81
  4. Step 4: Simplify right side
    399,062.89x = 119,929,781,272.96
  5. Step 5: Solve for x
    x = 119,929,781,272.96/399,062.89
  6. Step 6: Final answer
    x = 300,528.52

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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.