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Finding the Fourth Proportional to 278,479.80, 417,870.96 and 118,529.64

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Solution

The fourth proportional to 278,479.80, 417,870.96 and 118,529.64 is: 177,858.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,479.80 : 417,870.96 = 118,529.64 : x
  2. Step 2: Convert to fraction form
    278,479.80/417,870.96 = 118,529.64/x
  3. Step 3: Cross multiply
    278,479.80x = 417,870.96 × 118,529.64
  4. Step 4: Simplify right side
    278,479.80x = 49,530,094,455.25
  5. Step 5: Solve for x
    x = 49,530,094,455.25/278,479.80
  6. Step 6: Final answer
    x = 177,858.84

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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.