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Finding the Fourth Proportional to 395,033.54, 545,143.28 and 213,744.90

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Solution

The fourth proportional to 395,033.54, 545,143.28 and 213,744.90 is: 294,966.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,033.54 : 545,143.28 = 213,744.90 : x
  2. Step 2: Convert to fraction form
    395,033.54/545,143.28 = 213,744.90/x
  3. Step 3: Cross multiply
    395,033.54x = 545,143.28 × 213,744.90
  4. Step 4: Simplify right side
    395,033.54x = 116,521,595,869.27
  5. Step 5: Solve for x
    x = 116,521,595,869.27/395,033.54
  6. Step 6: Final answer
    x = 294,966.34

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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.