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Finding the Fourth Proportional to 1,186.03, 1,778.02 and 637.58

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Solution

The fourth proportional to 1,186.03, 1,778.02 and 637.58 is: 955.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.03 : 1,778.02 = 637.58 : x
  2. Step 2: Convert to fraction form
    1,186.03/1,778.02 = 637.58/x
  3. Step 3: Cross multiply
    1,186.03x = 1,778.02 × 637.58
  4. Step 4: Simplify right side
    1,186.03x = 1,133,619.51
  5. Step 5: Solve for x
    x = 1,133,619.51/1,186.03
  6. Step 6: Final answer
    x = 955.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.