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Finding the Fourth Proportional to 807.77, 1,114.56 and 475.98

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Solution

The fourth proportional to 807.77, 1,114.56 and 475.98 is: 656.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.77 : 1,114.56 = 475.98 : x
  2. Step 2: Convert to fraction form
    807.77/1,114.56 = 475.98/x
  3. Step 3: Cross multiply
    807.77x = 1,114.56 × 475.98
  4. Step 4: Simplify right side
    807.77x = 530,504.09
  5. Step 5: Solve for x
    x = 530,504.09/807.77
  6. Step 6: Final answer
    x = 656.75

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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.