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Finding the Fourth Proportional to 278,300.70, 417,350.39 and 118,387.26

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Solution

The fourth proportional to 278,300.70, 417,350.39 and 118,387.26 is: 177,538.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,300.70 : 417,350.39 = 118,387.26 : x
  2. Step 2: Convert to fraction form
    278,300.70/417,350.39 = 118,387.26/x
  3. Step 3: Cross multiply
    278,300.70x = 417,350.39 × 118,387.26
  4. Step 4: Simplify right side
    278,300.70x = 49,408,968,540.10
  5. Step 5: Solve for x
    x = 49,408,968,540.10/278,300.70
  6. Step 6: Final answer
    x = 177,538.07

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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.