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Finding the Fourth Proportional to 323,770.60, 485,655.90 and 289,653.40

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Solution

The fourth proportional to 323,770.60, 485,655.90 and 289,653.40 is: 434,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,770.60 : 485,655.90 = 289,653.40 : x
  2. Step 2: Convert to fraction form
    323,770.60/485,655.90 = 289,653.40/x
  3. Step 3: Cross multiply
    323,770.60x = 485,655.90 × 289,653.40
  4. Step 4: Simplify right side
    323,770.60x = 140,671,882,665.06
  5. Step 5: Solve for x
    x = 140,671,882,665.06/323,770.60
  6. Step 6: Final answer
    x = 434,480.10

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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.