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Finding the Fourth Proportional to 811.03, 1,118.72 and 496.42

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Solution

The fourth proportional to 811.03, 1,118.72 and 496.42 is: 684.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.03 : 1,118.72 = 496.42 : x
  2. Step 2: Convert to fraction form
    811.03/1,118.72 = 496.42/x
  3. Step 3: Cross multiply
    811.03x = 1,118.72 × 496.42
  4. Step 4: Simplify right side
    811.03x = 555,354.98
  5. Step 5: Solve for x
    x = 555,354.98/811.03
  6. Step 6: Final answer
    x = 684.75

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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.