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Finding the Fourth Proportional to 388,046.55, 535,502.25 and 218,281.89

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Solution

The fourth proportional to 388,046.55, 535,502.25 and 218,281.89 is: 301,227.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,046.55 : 535,502.25 = 218,281.89 : x
  2. Step 2: Convert to fraction form
    388,046.55/535,502.25 = 218,281.89/x
  3. Step 3: Cross multiply
    388,046.55x = 535,502.25 × 218,281.89
  4. Step 4: Simplify right side
    388,046.55x = 116,890,443,229.25
  5. Step 5: Solve for x
    x = 116,890,443,229.25/388,046.55
  6. Step 6: Final answer
    x = 301,227.89

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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.