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Finding the Fourth Proportional to 940.17, 1,297.42 and 520.53

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Solution

The fourth proportional to 940.17, 1,297.42 and 520.53 is: 718.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.17 : 1,297.42 = 520.53 : x
  2. Step 2: Convert to fraction form
    940.17/1,297.42 = 520.53/x
  3. Step 3: Cross multiply
    940.17x = 1,297.42 × 520.53
  4. Step 4: Simplify right side
    940.17x = 675,346.03
  5. Step 5: Solve for x
    x = 675,346.03/940.17
  6. Step 6: Final answer
    x = 718.32

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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.