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Finding the Fourth Proportional to 348,356, 480,735.12 and 189,380

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Solution

The fourth proportional to 348,356, 480,735.12 and 189,380 is: 261,346.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,356 : 480,735.12 = 189,380 : x
  2. Step 2: Convert to fraction form
    348,356/480,735.12 = 189,380/x
  3. Step 3: Cross multiply
    348,356x = 480,735.12 × 189,380
  4. Step 4: Simplify right side
    348,356x = 91,041,617,025.60
  5. Step 5: Solve for x
    x = 91,041,617,025.60/348,356
  6. Step 6: Final answer
    x = 261,346.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.