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Finding the Fourth Proportional to 388,137.66, 535,629.85 and 216,051.89

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Solution

The fourth proportional to 388,137.66, 535,629.85 and 216,051.89 is: 298,151.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,137.66 : 535,629.85 = 216,051.89 : x
  2. Step 2: Convert to fraction form
    388,137.66/535,629.85 = 216,051.89/x
  3. Step 3: Cross multiply
    388,137.66x = 535,629.85 × 216,051.89
  4. Step 4: Simplify right side
    388,137.66x = 115,723,841,432.92
  5. Step 5: Solve for x
    x = 115,723,841,432.92/388,137.66
  6. Step 6: Final answer
    x = 298,151.54

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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.