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Finding the Fourth Proportional to 681.67, 940.17 and 457.53

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Solution

The fourth proportional to 681.67, 940.17 and 457.53 is: 631.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.67 : 940.17 = 457.53 : x
  2. Step 2: Convert to fraction form
    681.67/940.17 = 457.53/x
  3. Step 3: Cross multiply
    681.67x = 940.17 × 457.53
  4. Step 4: Simplify right side
    681.67x = 430,159.97
  5. Step 5: Solve for x
    x = 430,159.97/681.67
  6. Step 6: Final answer
    x = 631.04

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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.