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Finding the Fourth Proportional to 1,065.21, 1,468.77 and 854.70

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Solution

The fourth proportional to 1,065.21, 1,468.77 and 854.70 is: 1,178.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.21 : 1,468.77 = 854.70 : x
  2. Step 2: Convert to fraction form
    1,065.21/1,468.77 = 854.70/x
  3. Step 3: Cross multiply
    1,065.21x = 1,468.77 × 854.70
  4. Step 4: Simplify right side
    1,065.21x = 1,255,357.72
  5. Step 5: Solve for x
    x = 1,255,357.72/1,065.21
  6. Step 6: Final answer
    x = 1,178.51

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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.