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Finding the Fourth Proportional to 395,289.72, 545,495.91 and 213,996.86

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Solution

The fourth proportional to 395,289.72, 545,495.91 and 213,996.86 is: 295,313.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,289.72 : 545,495.91 = 213,996.86 : x
  2. Step 2: Convert to fraction form
    395,289.72/545,495.91 = 213,996.86/x
  3. Step 3: Cross multiply
    395,289.72x = 545,495.91 × 213,996.86
  4. Step 4: Simplify right side
    395,289.72x = 116,734,411,882.84
  5. Step 5: Solve for x
    x = 116,734,411,882.84/395,289.72
  6. Step 6: Final answer
    x = 295,313.55

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1.5x scale

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.