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Finding the Fourth Proportional to 363,942.80, 545,914.20 and 127,309.40

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Solution

The fourth proportional to 363,942.80, 545,914.20 and 127,309.40 is: 190,964.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,942.80 : 545,914.20 = 127,309.40 : x
  2. Step 2: Convert to fraction form
    363,942.80/545,914.20 = 127,309.40/x
  3. Step 3: Cross multiply
    363,942.80x = 545,914.20 × 127,309.40
  4. Step 4: Simplify right side
    363,942.80x = 69,500,009,253.48
  5. Step 5: Solve for x
    x = 69,500,009,253.48/363,942.80
  6. Step 6: Final answer
    x = 190,964.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.