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Finding the Fourth Proportional to 644,804.60, 966,915.30 and 289,635.80

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Solution

The fourth proportional to 644,804.60, 966,915.30 and 289,635.80 is: 434,322.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,804.60 : 966,915.30 = 289,635.80 : x
  2. Step 2: Convert to fraction form
    644,804.60/966,915.30 = 289,635.80/x
  3. Step 3: Cross multiply
    644,804.60x = 966,915.30 × 289,635.80
  4. Step 4: Simplify right side
    644,804.60x = 280,053,286,447.74
  5. Step 5: Solve for x
    x = 280,053,286,447.74/644,804.60
  6. Step 6: Final answer
    x = 434,322.72

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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.