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Finding the Fourth Proportional to 445,438.76, 668,271.54 and 145,939.64

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Solution

The fourth proportional to 445,438.76, 668,271.54 and 145,939.64 is: 218,946.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,438.76 : 668,271.54 = 145,939.64 : x
  2. Step 2: Convert to fraction form
    445,438.76/668,271.54 = 145,939.64/x
  3. Step 3: Cross multiply
    445,438.76x = 668,271.54 × 145,939.64
  4. Step 4: Simplify right side
    445,438.76x = 97,527,307,969.85
  5. Step 5: Solve for x
    x = 97,527,307,969.85/445,438.76
  6. Step 6: Final answer
    x = 218,946.61

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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.