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Finding the Fourth Proportional to 1,066.77, 1,597.41 and 857.55

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Solution

The fourth proportional to 1,066.77, 1,597.41 and 857.55 is: 1,284.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.77 : 1,597.41 = 857.55 : x
  2. Step 2: Convert to fraction form
    1,066.77/1,597.41 = 857.55/x
  3. Step 3: Cross multiply
    1,066.77x = 1,597.41 × 857.55
  4. Step 4: Simplify right side
    1,066.77x = 1,369,858.95
  5. Step 5: Solve for x
    x = 1,369,858.95/1,066.77
  6. Step 6: Final answer
    x = 1,284.12

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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.