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Finding the Fourth Proportional to 388,285.08, 535,907.70 and 235,406.60

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Solution

The fourth proportional to 388,285.08, 535,907.70 and 235,406.60 is: 324,906.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,285.08 : 535,907.70 = 235,406.60 : x
  2. Step 2: Convert to fraction form
    388,285.08/535,907.70 = 235,406.60/x
  3. Step 3: Cross multiply
    388,285.08x = 535,907.70 × 235,406.60
  4. Step 4: Simplify right side
    388,285.08x = 126,156,209,570.82
  5. Step 5: Solve for x
    x = 126,156,209,570.82/388,285.08
  6. Step 6: Final answer
    x = 324,906.15

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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.