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Finding the Fourth Proportional to 388,540.60, 536,174.18 and 216,458.48

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Solution

The fourth proportional to 388,540.60, 536,174.18 and 216,458.48 is: 298,706.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,540.60 : 536,174.18 = 216,458.48 : x
  2. Step 2: Convert to fraction form
    388,540.60/536,174.18 = 216,458.48/x
  3. Step 3: Cross multiply
    388,540.60x = 536,174.18 × 216,458.48
  4. Step 4: Simplify right side
    388,540.60x = 116,059,447,289.51
  5. Step 5: Solve for x
    x = 116,059,447,289.51/388,540.60
  6. Step 6: Final answer
    x = 298,706.10

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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.