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Finding the Fourth Proportional to 847.62, 1,169.70 and 515.98

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Solution

The fourth proportional to 847.62, 1,169.70 and 515.98 is: 712.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.62 : 1,169.70 = 515.98 : x
  2. Step 2: Convert to fraction form
    847.62/1,169.70 = 515.98/x
  3. Step 3: Cross multiply
    847.62x = 1,169.70 × 515.98
  4. Step 4: Simplify right side
    847.62x = 603,535.96
  5. Step 5: Solve for x
    x = 603,535.96/847.62
  6. Step 6: Final answer
    x = 712.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.