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Finding the Fourth Proportional to 854.92, 1,179.85 and 505.72

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Solution

The fourth proportional to 854.92, 1,179.85 and 505.72 is: 697.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.92 : 1,179.85 = 505.72 : x
  2. Step 2: Convert to fraction form
    854.92/1,179.85 = 505.72/x
  3. Step 3: Cross multiply
    854.92x = 1,179.85 × 505.72
  4. Step 4: Simplify right side
    854.92x = 596,673.74
  5. Step 5: Solve for x
    x = 596,673.74/854.92
  6. Step 6: Final answer
    x = 697.93

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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.