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Finding the Fourth Proportional to 256,483.33, 384,731.57 and 121,515.81

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Solution

The fourth proportional to 256,483.33, 384,731.57 and 121,515.81 is: 182,276.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,483.33 : 384,731.57 = 121,515.81 : x
  2. Step 2: Convert to fraction form
    256,483.33/384,731.57 = 121,515.81/x
  3. Step 3: Cross multiply
    256,483.33x = 384,731.57 × 121,515.81
  4. Step 4: Simplify right side
    256,483.33x = 46,750,968,361.12
  5. Step 5: Solve for x
    x = 46,750,968,361.12/256,483.33
  6. Step 6: Final answer
    x = 182,276.83

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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.