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Finding the Fourth Proportional to 363,896.40, 545,698.80 and 127,117.20

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Solution

The fourth proportional to 363,896.40, 545,698.80 and 127,117.20 is: 190,624.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,896.40 : 545,698.80 = 127,117.20 : x
  2. Step 2: Convert to fraction form
    363,896.40/545,698.80 = 127,117.20/x
  3. Step 3: Cross multiply
    363,896.40x = 545,698.80 × 127,117.20
  4. Step 4: Simplify right side
    363,896.40x = 69,367,703,499.36
  5. Step 5: Solve for x
    x = 69,367,703,499.36/363,896.40
  6. Step 6: Final answer
    x = 190,624.87

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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.