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Finding the Fourth Proportional to 808.58, 1,114.56 and 659.81

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Solution

The fourth proportional to 808.58, 1,114.56 and 659.81 is: 909.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.58 : 1,114.56 = 659.81 : x
  2. Step 2: Convert to fraction form
    808.58/1,114.56 = 659.81/x
  3. Step 3: Cross multiply
    808.58x = 1,114.56 × 659.81
  4. Step 4: Simplify right side
    808.58x = 735,400.62
  5. Step 5: Solve for x
    x = 735,400.62/808.58
  6. Step 6: Final answer
    x = 909.49

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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.