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Finding the Fourth Proportional to 612,665.29, 919,041.87 and 163,383.80

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Solution

The fourth proportional to 612,665.29, 919,041.87 and 163,383.80 is: 245,087.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,665.29 : 919,041.87 = 163,383.80 : x
  2. Step 2: Convert to fraction form
    612,665.29/919,041.87 = 163,383.80/x
  3. Step 3: Cross multiply
    612,665.29x = 919,041.87 × 163,383.80
  4. Step 4: Simplify right side
    612,665.29x = 150,156,553,079.71
  5. Step 5: Solve for x
    x = 150,156,553,079.71/612,665.29
  6. Step 6: Final answer
    x = 245,087.42

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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.