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Finding the Fourth Proportional to 308,812.90, 463,392.15 and 131,289.70

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Solution

The fourth proportional to 308,812.90, 463,392.15 and 131,289.70 is: 197,008.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,812.90 : 463,392.15 = 131,289.70 : x
  2. Step 2: Convert to fraction form
    308,812.90/463,392.15 = 131,289.70/x
  3. Step 3: Cross multiply
    308,812.90x = 463,392.15 × 131,289.70
  4. Step 4: Simplify right side
    308,812.90x = 60,838,616,355.86
  5. Step 5: Solve for x
    x = 60,838,616,355.86/308,812.90
  6. Step 6: Final answer
    x = 197,008.01

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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.