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Finding the Fourth Proportional to 647.16, 892.62 and 559.68

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Solution

The fourth proportional to 647.16, 892.62 and 559.68 is: 771.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.16 : 892.62 = 559.68 : x
  2. Step 2: Convert to fraction form
    647.16/892.62 = 559.68/x
  3. Step 3: Cross multiply
    647.16x = 892.62 × 559.68
  4. Step 4: Simplify right side
    647.16x = 499,581.56
  5. Step 5: Solve for x
    x = 499,581.56/647.16
  6. Step 6: Final answer
    x = 771.96

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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.