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Finding the Fourth Proportional to 351,653.28, 485,280.95 and 190,509

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Solution

The fourth proportional to 351,653.28, 485,280.95 and 190,509 is: 262,902.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,653.28 : 485,280.95 = 190,509 : x
  2. Step 2: Convert to fraction form
    351,653.28/485,280.95 = 190,509/x
  3. Step 3: Cross multiply
    351,653.28x = 485,280.95 × 190,509
  4. Step 4: Simplify right side
    351,653.28x = 92,450,387,551.01
  5. Step 5: Solve for x
    x = 92,450,387,551.01/351,653.28
  6. Step 6: Final answer
    x = 262,902.11

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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.