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Finding the Fourth Proportional to 519,744, 717,246.72 and 281,280

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Solution

The fourth proportional to 519,744, 717,246.72 and 281,280 is: 388,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,744 : 717,246.72 = 281,280 : x
  2. Step 2: Convert to fraction form
    519,744/717,246.72 = 281,280/x
  3. Step 3: Cross multiply
    519,744x = 717,246.72 × 281,280
  4. Step 4: Simplify right side
    519,744x = 201,747,157,401.60
  5. Step 5: Solve for x
    x = 201,747,157,401.60/519,744
  6. Step 6: Final answer
    x = 388,166.40

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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.