Home / 388,214.12-535,722.32-218,415.44

Finding the Fourth Proportional to 388,214.12, 535,722.32 and 218,415.44

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Solution

The fourth proportional to 388,214.12, 535,722.32 and 218,415.44 is: 301,405.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,214.12 : 535,722.32 = 218,415.44 : x
  2. Step 2: Convert to fraction form
    388,214.12/535,722.32 = 218,415.44/x
  3. Step 3: Cross multiply
    388,214.12x = 535,722.32 × 218,415.44
  4. Step 4: Simplify right side
    388,214.12x = 117,010,022,469.93
  5. Step 5: Solve for x
    x = 117,010,022,469.93/388,214.12
  6. Step 6: Final answer
    x = 301,405.89

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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.