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Finding the Fourth Proportional to 395,205.30, 545,393.94 and 240,103.80

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Solution

The fourth proportional to 395,205.30, 545,393.94 and 240,103.80 is: 331,349.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,205.30 : 545,393.94 = 240,103.80 : x
  2. Step 2: Convert to fraction form
    395,205.30/545,393.94 = 240,103.80/x
  3. Step 3: Cross multiply
    395,205.30x = 545,393.94 × 240,103.80
  4. Step 4: Simplify right side
    395,205.30x = 130,951,157,490.97
  5. Step 5: Solve for x
    x = 130,951,157,490.97/395,205.30
  6. Step 6: Final answer
    x = 331,349.70

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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.