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Finding the Fourth Proportional to 388,378.64, 535,951.64 and 216,296.54

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Solution

The fourth proportional to 388,378.64, 535,951.64 and 216,296.54 is: 298,483.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,378.64 : 535,951.64 = 216,296.54 : x
  2. Step 2: Convert to fraction form
    388,378.64/535,951.64 = 216,296.54/x
  3. Step 3: Cross multiply
    388,378.64x = 535,951.64 × 216,296.54
  4. Step 4: Simplify right side
    388,378.64x = 115,924,485,339.33
  5. Step 5: Solve for x
    x = 115,924,485,339.33/388,378.64
  6. Step 6: Final answer
    x = 298,483.16

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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.