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Finding the Fourth Proportional to 847.56, 1,271.50 and 414.68

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Solution

The fourth proportional to 847.56, 1,271.50 and 414.68 is: 622.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.56 : 1,271.50 = 414.68 : x
  2. Step 2: Convert to fraction form
    847.56/1,271.50 = 414.68/x
  3. Step 3: Cross multiply
    847.56x = 1,271.50 × 414.68
  4. Step 4: Simplify right side
    847.56x = 527,265.62
  5. Step 5: Solve for x
    x = 527,265.62/847.56
  6. Step 6: Final answer
    x = 622.10

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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.