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Finding the Fourth Proportional to 429,990.92, 644,986.67 and 110,143.98

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Solution

The fourth proportional to 429,990.92, 644,986.67 and 110,143.98 is: 165,216.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,990.92 : 644,986.67 = 110,143.98 : x
  2. Step 2: Convert to fraction form
    429,990.92/644,986.67 = 110,143.98/x
  3. Step 3: Cross multiply
    429,990.92x = 644,986.67 × 110,143.98
  4. Step 4: Simplify right side
    429,990.92x = 71,041,398,330.03
  5. Step 5: Solve for x
    x = 71,041,398,330.03/429,990.92
  6. Step 6: Final answer
    x = 165,216.04

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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.