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Finding the Fourth Proportional to 810.46, 1,118.02 and 682.66

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Solution

The fourth proportional to 810.46, 1,118.02 and 682.66 is: 941.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.46 : 1,118.02 = 682.66 : x
  2. Step 2: Convert to fraction form
    810.46/1,118.02 = 682.66/x
  3. Step 3: Cross multiply
    810.46x = 1,118.02 × 682.66
  4. Step 4: Simplify right side
    810.46x = 763,227.53
  5. Step 5: Solve for x
    x = 763,227.53/810.46
  6. Step 6: Final answer
    x = 941.72

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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.