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Finding the Fourth Proportional to 612,812.76, 919,366.78 and 192,088.62

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Solution

The fourth proportional to 612,812.76, 919,366.78 and 192,088.62 is: 288,179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,812.76 : 919,366.78 = 192,088.62 : x
  2. Step 2: Convert to fraction form
    612,812.76/919,366.78 = 192,088.62/x
  3. Step 3: Cross multiply
    612,812.76x = 919,366.78 × 192,088.62
  4. Step 4: Simplify right side
    612,812.76x = 176,599,896,044.04
  5. Step 5: Solve for x
    x = 176,599,896,044.04/612,812.76
  6. Step 6: Final answer
    x = 288,179.21

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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.