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Finding the Fourth Proportional to 303,973.60, 455,960.40 and 279,479.20

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Solution

The fourth proportional to 303,973.60, 455,960.40 and 279,479.20 is: 419,218.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,973.60 : 455,960.40 = 279,479.20 : x
  2. Step 2: Convert to fraction form
    303,973.60/455,960.40 = 279,479.20/x
  3. Step 3: Cross multiply
    303,973.60x = 455,960.40 × 279,479.20
  4. Step 4: Simplify right side
    303,973.60x = 127,431,447,823.68
  5. Step 5: Solve for x
    x = 127,431,447,823.68/303,973.60
  6. Step 6: Final answer
    x = 419,218.80

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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.