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Finding the Fourth Proportional to 1,185.51, 1,635.99 and 654.45

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Solution

The fourth proportional to 1,185.51, 1,635.99 and 654.45 is: 903.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.51 : 1,635.99 = 654.45 : x
  2. Step 2: Convert to fraction form
    1,185.51/1,635.99 = 654.45/x
  3. Step 3: Cross multiply
    1,185.51x = 1,635.99 × 654.45
  4. Step 4: Simplify right side
    1,185.51x = 1,070,665.07
  5. Step 5: Solve for x
    x = 1,070,665.07/1,185.51
  6. Step 6: Final answer
    x = 903.13

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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.