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Finding the Fourth Proportional to 321,866.10, 482,885.55 and 287,046.90

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Solution

The fourth proportional to 321,866.10, 482,885.55 and 287,046.90 is: 430,647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,866.10 : 482,885.55 = 287,046.90 : x
  2. Step 2: Convert to fraction form
    321,866.10/482,885.55 = 287,046.90/x
  3. Step 3: Cross multiply
    321,866.10x = 482,885.55 × 287,046.90
  4. Step 4: Simplify right side
    321,866.10x = 138,610,800,182.30
  5. Step 5: Solve for x
    x = 138,610,800,182.30/321,866.10
  6. Step 6: Final answer
    x = 430,647.40

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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.