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Finding the Fourth Proportional to 388,276.78, 535,733.31 and 218,448.94

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Solution

The fourth proportional to 388,276.78, 535,733.31 and 218,448.94 is: 301,409.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,276.78 : 535,733.31 = 218,448.94 : x
  2. Step 2: Convert to fraction form
    388,276.78/535,733.31 = 218,448.94/x
  3. Step 3: Cross multiply
    388,276.78x = 535,733.31 × 218,448.94
  4. Step 4: Simplify right side
    388,276.78x = 117,030,373,692.19
  5. Step 5: Solve for x
    x = 117,030,373,692.19/388,276.78
  6. Step 6: Final answer
    x = 301,409.66

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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.