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Finding the Fourth Proportional to 388,323.83, 535,885.79 and 218,557.95

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Solution

The fourth proportional to 388,323.83, 535,885.79 and 218,557.95 is: 301,609.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,323.83 : 535,885.79 = 218,557.95 : x
  2. Step 2: Convert to fraction form
    388,323.83/535,885.79 = 218,557.95/x
  3. Step 3: Cross multiply
    388,323.83x = 535,885.79 × 218,557.95
  4. Step 4: Simplify right side
    388,323.83x = 117,122,098,603.74
  5. Step 5: Solve for x
    x = 117,122,098,603.74/388,323.83
  6. Step 6: Final answer
    x = 301,609.36

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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.