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Finding the Fourth Proportional to 399,329.04, 551,069.84 and 218,040.40

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Solution

The fourth proportional to 399,329.04, 551,069.84 and 218,040.40 is: 300,893.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,329.04 : 551,069.84 = 218,040.40 : x
  2. Step 2: Convert to fraction form
    399,329.04/551,069.84 = 218,040.40/x
  3. Step 3: Cross multiply
    399,329.04x = 551,069.84 × 218,040.40
  4. Step 4: Simplify right side
    399,329.04x = 120,155,488,341.54
  5. Step 5: Solve for x
    x = 120,155,488,341.54/399,329.04
  6. Step 6: Final answer
    x = 300,893.44

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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.