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Finding the Fourth Proportional to 859.18, 1,186.08 and 544.60

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Solution

The fourth proportional to 859.18, 1,186.08 and 544.60 is: 751.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.18 : 1,186.08 = 544.60 : x
  2. Step 2: Convert to fraction form
    859.18/1,186.08 = 544.60/x
  3. Step 3: Cross multiply
    859.18x = 1,186.08 × 544.60
  4. Step 4: Simplify right side
    859.18x = 645,939.17
  5. Step 5: Solve for x
    x = 645,939.17/859.18
  6. Step 6: Final answer
    x = 751.81

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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.