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Finding the Fourth Proportional to 363,940.80, 545,911.20 and 127,307.40

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Solution

The fourth proportional to 363,940.80, 545,911.20 and 127,307.40 is: 190,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,940.80 : 545,911.20 = 127,307.40 : x
  2. Step 2: Convert to fraction form
    363,940.80/545,911.20 = 127,307.40/x
  3. Step 3: Cross multiply
    363,940.80x = 545,911.20 × 127,307.40
  4. Step 4: Simplify right side
    363,940.80x = 69,498,535,502.88
  5. Step 5: Solve for x
    x = 69,498,535,502.88/363,940.80
  6. Step 6: Final answer
    x = 190,961.10

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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.