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Finding the Fourth Proportional to 395,276.88, 545,481.40 and 213,988.76

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Solution

The fourth proportional to 395,276.88, 545,481.40 and 213,988.76 is: 295,304.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,276.88 : 545,481.40 = 213,988.76 : x
  2. Step 2: Convert to fraction form
    395,276.88/545,481.40 = 213,988.76/x
  3. Step 3: Cross multiply
    395,276.88x = 545,481.40 × 213,988.76
  4. Step 4: Simplify right side
    395,276.88x = 116,726,888,389.06
  5. Step 5: Solve for x
    x = 116,726,888,389.06/395,276.88
  6. Step 6: Final answer
    x = 295,304.11

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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.