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Finding the Fourth Proportional to 810.21, 1,118.12 and 460.92

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Solution

The fourth proportional to 810.21, 1,118.12 and 460.92 is: 636.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.21 : 1,118.12 = 460.92 : x
  2. Step 2: Convert to fraction form
    810.21/1,118.12 = 460.92/x
  3. Step 3: Cross multiply
    810.21x = 1,118.12 × 460.92
  4. Step 4: Simplify right side
    810.21x = 515,361.57
  5. Step 5: Solve for x
    x = 515,361.57/810.21
  6. Step 6: Final answer
    x = 636.08

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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.