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Finding the Fourth Proportional to 388,201.45, 535,730.01 and 211,403.67

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Solution

The fourth proportional to 388,201.45, 535,730.01 and 211,403.67 is: 291,743.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,201.45 : 535,730.01 = 211,403.67 : x
  2. Step 2: Convert to fraction form
    388,201.45/535,730.01 = 211,403.67/x
  3. Step 3: Cross multiply
    388,201.45x = 535,730.01 × 211,403.67
  4. Step 4: Simplify right side
    388,201.45x = 113,255,290,243.14
  5. Step 5: Solve for x
    x = 113,255,290,243.14/388,201.45
  6. Step 6: Final answer
    x = 291,743.60

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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.