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Finding the Fourth Proportional to 854.85, 1,179.69 and 461.87

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Solution

The fourth proportional to 854.85, 1,179.69 and 461.87 is: 637.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.85 : 1,179.69 = 461.87 : x
  2. Step 2: Convert to fraction form
    854.85/1,179.69 = 461.87/x
  3. Step 3: Cross multiply
    854.85x = 1,179.69 × 461.87
  4. Step 4: Simplify right side
    854.85x = 544,867.24
  5. Step 5: Solve for x
    x = 544,867.24/854.85
  6. Step 6: Final answer
    x = 637.38

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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.