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Finding the Fourth Proportional to 278,070.40, 417,105.60 and 188,840.80

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Solution

The fourth proportional to 278,070.40, 417,105.60 and 188,840.80 is: 283,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,070.40 : 417,105.60 = 188,840.80 : x
  2. Step 2: Convert to fraction form
    278,070.40/417,105.60 = 188,840.80/x
  3. Step 3: Cross multiply
    278,070.40x = 417,105.60 × 188,840.80
  4. Step 4: Simplify right side
    278,070.40x = 78,766,555,188.48
  5. Step 5: Solve for x
    x = 78,766,555,188.48/278,070.40
  6. Step 6: Final answer
    x = 283,261.20

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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.