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Finding the Fourth Proportional to 388,072.46, 535,539.16 and 218,306.58

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Solution

The fourth proportional to 388,072.46, 535,539.16 and 218,306.58 is: 301,262.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,072.46 : 535,539.16 = 218,306.58 : x
  2. Step 2: Convert to fraction form
    388,072.46/535,539.16 = 218,306.58/x
  3. Step 3: Cross multiply
    388,072.46x = 535,539.16 × 218,306.58
  4. Step 4: Simplify right side
    388,072.46x = 116,911,722,475.67
  5. Step 5: Solve for x
    x = 116,911,722,475.67/388,072.46
  6. Step 6: Final answer
    x = 301,262.61

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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.