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Finding the Fourth Proportional to 445,871.20, 668,806.80 and 165,330.40

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Solution

The fourth proportional to 445,871.20, 668,806.80 and 165,330.40 is: 247,995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,871.20 : 668,806.80 = 165,330.40 : x
  2. Step 2: Convert to fraction form
    445,871.20/668,806.80 = 165,330.40/x
  3. Step 3: Cross multiply
    445,871.20x = 668,806.80 × 165,330.40
  4. Step 4: Simplify right side
    445,871.20x = 110,574,095,766.72
  5. Step 5: Solve for x
    x = 110,574,095,766.72/445,871.20
  6. Step 6: Final answer
    x = 247,995.60

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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.