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Finding the Fourth Proportional to 399,510.25, 551,340.36 and 229,744.39

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Solution

The fourth proportional to 399,510.25, 551,340.36 and 229,744.39 is: 317,056.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,510.25 : 551,340.36 = 229,744.39 : x
  2. Step 2: Convert to fraction form
    399,510.25/551,340.36 = 229,744.39/x
  3. Step 3: Cross multiply
    399,510.25x = 551,340.36 × 229,744.39
  4. Step 4: Simplify right side
    399,510.25x = 126,667,354,690.58
  5. Step 5: Solve for x
    x = 126,667,354,690.58/399,510.25
  6. Step 6: Final answer
    x = 317,056.58

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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.