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Finding the Fourth Proportional to 864.06, 1,190.70 and 808.44

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Solution

The fourth proportional to 864.06, 1,190.70 and 808.44 is: 1,114.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.06 : 1,190.70 = 808.44 : x
  2. Step 2: Convert to fraction form
    864.06/1,190.70 = 808.44/x
  3. Step 3: Cross multiply
    864.06x = 1,190.70 × 808.44
  4. Step 4: Simplify right side
    864.06x = 962,609.51
  5. Step 5: Solve for x
    x = 962,609.51/864.06
  6. Step 6: Final answer
    x = 1,114.05

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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.