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Finding the Fourth Proportional to 388,431.54, 536,036.40 and 216,348.12

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Solution

The fourth proportional to 388,431.54, 536,036.40 and 216,348.12 is: 298,560.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,431.54 : 536,036.40 = 216,348.12 : x
  2. Step 2: Convert to fraction form
    388,431.54/536,036.40 = 216,348.12/x
  3. Step 3: Cross multiply
    388,431.54x = 536,036.40 × 216,348.12
  4. Step 4: Simplify right side
    388,431.54x = 115,970,467,391.57
  5. Step 5: Solve for x
    x = 115,970,467,391.57/388,431.54
  6. Step 6: Final answer
    x = 298,560.89

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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.