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Finding the Fourth Proportional to 1,186.03, 1,787.09 and 985.10

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Solution

The fourth proportional to 1,186.03, 1,787.09 and 985.10 is: 1,484.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.03 : 1,787.09 = 985.10 : x
  2. Step 2: Convert to fraction form
    1,186.03/1,787.09 = 985.10/x
  3. Step 3: Cross multiply
    1,186.03x = 1,787.09 × 985.10
  4. Step 4: Simplify right side
    1,186.03x = 1,760,466.35
  5. Step 5: Solve for x
    x = 1,760,466.35/1,186.03
  6. Step 6: Final answer
    x = 1,484.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.