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Finding the Fourth Proportional to 320,451.95, 480,725.78 and 118,032.68

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Solution

The fourth proportional to 320,451.95, 480,725.78 and 118,032.68 is: 177,066.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,451.95 : 480,725.78 = 118,032.68 : x
  2. Step 2: Convert to fraction form
    320,451.95/480,725.78 = 118,032.68/x
  3. Step 3: Cross multiply
    320,451.95x = 480,725.78 × 118,032.68
  4. Step 4: Simplify right side
    320,451.95x = 56,741,349,164.70
  5. Step 5: Solve for x
    x = 56,741,349,164.70/320,451.95
  6. Step 6: Final answer
    x = 177,066.64

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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.