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Finding the Fourth Proportional to 1,185.50, 1,636.01 and 654.40

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Solution

The fourth proportional to 1,185.50, 1,636.01 and 654.40 is: 903.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.50 : 1,636.01 = 654.40 : x
  2. Step 2: Convert to fraction form
    1,185.50/1,636.01 = 654.40/x
  3. Step 3: Cross multiply
    1,185.50x = 1,636.01 × 654.40
  4. Step 4: Simplify right side
    1,185.50x = 1,070,593.49
  5. Step 5: Solve for x
    x = 1,070,593.49/1,185.50
  6. Step 6: Final answer
    x = 903.07

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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.