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Finding the Fourth Proportional to 399,858.04, 551,804.05 and 218,570.69

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Solution

The fourth proportional to 399,858.04, 551,804.05 and 218,570.69 is: 301,627.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,858.04 : 551,804.05 = 218,570.69 : x
  2. Step 2: Convert to fraction form
    399,858.04/551,804.05 = 218,570.69/x
  3. Step 3: Cross multiply
    399,858.04x = 551,804.05 × 218,570.69
  4. Step 4: Simplify right side
    399,858.04x = 120,608,191,953.30
  5. Step 5: Solve for x
    x = 120,608,191,953.30/399,858.04
  6. Step 6: Final answer
    x = 301,627.53

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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.