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Finding the Fourth Proportional to 427,866.57, 641,898.28 and 143,594.84

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Solution

The fourth proportional to 427,866.57, 641,898.28 and 143,594.84 is: 215,425.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,866.57 : 641,898.28 = 143,594.84 : x
  2. Step 2: Convert to fraction form
    427,866.57/641,898.28 = 143,594.84/x
  3. Step 3: Cross multiply
    427,866.57x = 641,898.28 × 143,594.84
  4. Step 4: Simplify right side
    427,866.57x = 92,173,280,812.88
  5. Step 5: Solve for x
    x = 92,173,280,812.88/427,866.57
  6. Step 6: Final answer
    x = 215,425.29

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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.