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Finding the Fourth Proportional to 1,353.66, 1,866.81 and 855.44

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Solution

The fourth proportional to 1,353.66, 1,866.81 and 855.44 is: 1,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.66 : 1,866.81 = 855.44 : x
  2. Step 2: Convert to fraction form
    1,353.66/1,866.81 = 855.44/x
  3. Step 3: Cross multiply
    1,353.66x = 1,866.81 × 855.44
  4. Step 4: Simplify right side
    1,353.66x = 1,596,934.61
  5. Step 5: Solve for x
    x = 1,596,934.61/1,353.66
  6. Step 6: Final answer
    x = 1,179.72

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1.5x scale

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.