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Finding the Fourth Proportional to 411,639.60, 617,848.20 and 254,175.60

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Solution

The fourth proportional to 411,639.60, 617,848.20 and 254,175.60 is: 381,503.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,639.60 : 617,848.20 = 254,175.60 : x
  2. Step 2: Convert to fraction form
    411,639.60/617,848.20 = 254,175.60/x
  3. Step 3: Cross multiply
    411,639.60x = 617,848.20 × 254,175.60
  4. Step 4: Simplify right side
    411,639.60x = 157,041,936,943.92
  5. Step 5: Solve for x
    x = 157,041,936,943.92/411,639.60
  6. Step 6: Final answer
    x = 381,503.47

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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.