Home / 278,336.40-417,504.60-128,532.38

Finding the Fourth Proportional to 278,336.40, 417,504.60 and 128,532.38

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Solution

The fourth proportional to 278,336.40, 417,504.60 and 128,532.38 is: 192,798.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,336.40 : 417,504.60 = 128,532.38 : x
  2. Step 2: Convert to fraction form
    278,336.40/417,504.60 = 128,532.38/x
  3. Step 3: Cross multiply
    278,336.40x = 417,504.60 × 128,532.38
  4. Step 4: Simplify right side
    278,336.40x = 53,662,857,811.43
  5. Step 5: Solve for x
    x = 53,662,857,811.43/278,336.40
  6. Step 6: Final answer
    x = 192,798.56

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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.