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Finding the Fourth Proportional to 388,766.93, 536,503.73 and 216,680.09

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Solution

The fourth proportional to 388,766.93, 536,503.73 and 216,680.09 is: 299,021.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,766.93 : 536,503.73 = 216,680.09 : x
  2. Step 2: Convert to fraction form
    388,766.93/536,503.73 = 216,680.09/x
  3. Step 3: Cross multiply
    388,766.93x = 536,503.73 × 216,680.09
  4. Step 4: Simplify right side
    388,766.93x = 116,249,672,735.82
  5. Step 5: Solve for x
    x = 116,249,672,735.82/388,766.93
  6. Step 6: Final answer
    x = 299,021.51

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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.