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Finding the Fourth Proportional to 388,792.80, 536,469.10 and 216,673.18

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Solution

The fourth proportional to 388,792.80, 536,469.10 and 216,673.18 is: 298,972.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,792.80 : 536,469.10 = 216,673.18 : x
  2. Step 2: Convert to fraction form
    388,792.80/536,469.10 = 216,673.18/x
  3. Step 3: Cross multiply
    388,792.80x = 536,469.10 × 216,673.18
  4. Step 4: Simplify right side
    388,792.80x = 116,238,465,868.74
  5. Step 5: Solve for x
    x = 116,238,465,868.74/388,792.80
  6. Step 6: Final answer
    x = 298,972.78

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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.